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Acute Lymphoblastic Leukaemia

Haematological cancers, part 8 · Adults and AYA · B- and T-ALL · Ph+ ALL with TKIs · MRD and transplant · Blinatumomab, inotuzumab and CAR-T · Lymphoblastic lymphoma · Key points for clinicians · Last updated 17 October 2026

For health professionals. This section uses clinical terms and is general education for doctors, nurses and students, not advice for an individual patient. Patients and families: please read our patient guides instead, Cancer Myth Busters · Understanding your cancer report · Living through cancer treatment, or speak with your own doctor.

Who this page is for, and where to start

Printable PDFs for this moduleMini reviews, slides, algorithms, quick references and the MCQ booklet are on the Printable Teaching Resources page. No PDF downloads are kept on this page.
For your patientsPlain-language Telugu–English answers for patients and families: the Leukaemia Myth Busters (20 myths), symptoms and warning signs and the Telugu handouts.
SurgeonsScreening and workup (03), local therapy with surgery types (05), algorithms (07), cases (11)
Physicians & oncologistsBiomarkers (04), systemic therapy (06), algorithms (07), survivorship (08), cases (11)
Postgraduate residentsOncology and other specialities: case vignettes (11), landmark trials (09) and 0 cited trials (12) for exams and journal clubs
Medical studentsAt a glance (01), presentation and common traps (02), the figures, and follow-up (08)

Prepared and reviewed by Dr. Haritha Chiramana, MD, DM, Senior Medical Oncologist & Hemato-Oncologist, C.R. Reddy Cancer Center, Nellore, Andhra Pradesh, India. She teaches oncology to postgraduates and medical students; colleges and departments may write to info@drharitha.co.in for teaching sessions. Printable Teaching Resources and how to cite → Phone 0861 232 5344 · WhatsApp +91 79896 42272.

01 At a glance
  • ALL is a cancer of lymphoid precursors (B lineage about 75%, T lineage about 25% of adult cases). It is mainly a disease of children, with a second peak after 60. Leukaemia and lymphoblastic lymphoma are the same disease: a mass with <20% marrow blasts is called lymphoma (LBL).
  • Suspect it from cytopenias with blasts, bone pain, nodes, a big liver or spleen, or a mediastinal mass with breathlessness or facial swelling (T-ALL).
  • Stabilise first: airway, superior vena cava and pericardium if there is a mass; tumour lysis (ALL is high or intermediate risk, never low); antibiotics for neutropenic fever. Leukostasis, DIC and infection care are shared with AML (AML module, emergencies).
  • Classify fast: flow cytometry for lineage, BCR::ABL1 within days (it changes induction), karyotype and FISH, a Ph-like screen where available, and a lumbar puncture for CNS grade.
  • Ph-negative, fit: paediatric-inspired, asparaginase-rich regimens up to about 40 (cure 60–80%), asparaginase regimens or hyper-CVAD at 40–65, rituximab for CD20+ disease; then blinatumomab with consolidation (E1910[1]: 3-year survival 85% vs 68%) and 2 or more years of maintenance.
  • MRD decides: MRD ≥10⁻⁴ after induction means high risk → blinatumomab, then allogeneic transplant for the fit (BLAST[2]).
  • Ph-positive: a TKI from day 1 to the end, with a steroid or low-intensity chemotherapy (GRAAPH-2005[3]); chemotherapy-free dasatinib then blinatumomab is possible (D-ALBA[4]).
  • Relapse: blinatumomab, inotuzumab or CD19 CAR-T for B-ALL; revumenib for KMT2A-rearranged; nelarabine for T-ALL; then allogeneic transplant.
  • India: many young adults; Indian AYA series report 40–60% survival on BFM-type protocols; abandonment (11–15%), resistant infections, cost and limited transplant access shape every decision (Ganesan 2021[5]).
ALL in one picture: suspect, stabilise, classify, then treat by Ph status, age, fitness and MRD1 · Suspect• Tired, pale, fever, bruising• Bone pain, nodes, big liver or spleen• Mediastinal mass (T-ALL)2 · Stabilise• Airway and SVC if a mass• Tumour lysis risk• Fever with neutropenia3 · Classify• Flow: B or T (TdT+, MPO−)• BCR::ABL1 within days• Lumbar puncture: CNS grade4 · Treat• Ph+: a TKI in every phase• Ph−: protocol by age and fitness• MRD decides blinatumomab or HCTAdults are not big children: Ph+ is 25–30% of adult ALL (up to half in older adults) and Ph-like up to one-third; 5-yearsurvival is about 50–70% at 19–40 years, 30–40% at 41–60 years, and only 10–15% of those over 60–65 were cured with conventionalchemotherapy (Ganesan 2021).Lymphoblastic lymphoma is the same disease with a mass and <20% marrow blasts: treat it on an ALL protocol.
Figure 1. The four steps (UpToDate ALL diagnosis and induction reviews; Ganesan 2021 for age-specific survival).
02 Clinical presentation, common traps & causes
How ALL and lymphoblastic lymphoma present in adultsB-ALL• Anaemia, infections, bleeding• Bone or joint pain• Liver, spleen or nodes in up to half• White count low, normal or very high• CNS: cranial nerve palsy, headacheT-ALL• Young men (2:1); 25% of adult ALL• Anterior mediastinal mass in 50–75%• Effusions, SVC obstruction, stridor• High white count; CNS more often• Testes involved more oftenLymphoblastic lymphoma• A mass with <20% marrow blasts• T-LBL: >80% stage III–IV• B symptoms in about half• About 60% later become leukaemic• B-LBL: bone, skin, nodesCNS involvement is present at diagnosis in 3–7% of adults; without CNS-directed therapy more than half develop CNS leukaemia,with prophylaxis fewer than 20%. The tempo varies: some present over weeks to months, others within days. Bone pain and bignodes point to ALL rather than AML.
Figure 2. Presentation (UpToDate B-ALL and T-ALL diagnosis reviews; CNS rates from the Ph-negative induction review).

Who gets it, and why

  • Age: world incidence 1–5 per 100,000 a year; three-quarters of B-ALL occurs before age 6, with a second peak after 60. T-ALL peaks in adolescents and young adults, with a 2:1 male excess.
  • Causes: unknown in most. Associations: ionising radiation, Down syndrome and other constitutional disorders, rare familial variants (PAX5, ETV6, TP53), and common inherited polymorphisms (ARID5B, IKZF1, CEBPE, CDKN2A/B, GATA3). Ph-like ALL is commoner in people of Hispanic ancestry.
  • Adults vs children: adults carry more adverse genetics (Ph+ 25–30%, rising to about half in older adults; Ph-like up to one-third) and tolerate asparaginase, steroids and vincristine less well (Roberts 2017[6]).
  • India: India has the world's largest adolescent and young adult population, so most centres treat many AYA patients; multidrug-resistant infections during intensive therapy are a recurring problem (Ganesan 2021[5]).
Children are different: why childhood ALL results do not transfer directly to adultsChildren• The commonest childhood cancer; three-quarters of B-ALL before age 6• More than 90% cured• Favourable genetics common (hyperdiploidy, ETV6::RUNX1)• Risk by age, WBC (50,000/µL), genetics, MRD• Asparaginase, steroids, vincristine well toleratedAdults• Second peak after 60• Ph+ 25–30%; Ph-like up to one-third• More toxicity from asparaginase, steroids and vincristine• Survival falls with every decade• Transplant used more oftenAdolescents and young adults do better on paediatric-type, asparaginase-rich regimens: 23 observational studies favour them(hazard ratio for 5-year survival 1.40), the basis of the 2026 ASH guideline for AYA ALL. Indian AYA series report 40–60%survival on BFM-type protocols.
Figure 3. Childhood vs adult ALL (UpToDate childhood diagnosis, risk and treatment reviews; DuVall 2026; Ganesan 2021). Childhood ALL is covered here only as a contrast.

Common traps

  • A normal or low white count does not exclude ALL: look at the smear and ask for flow cytometry.
  • Bone pain, limp or joint pain with odd counts may be leukaemia rather than arthritis.
  • A young man with cough, orthopnoea or facial swelling: think anterior mediastinal mass (T-ALL/T-LBL) and image before any procedure that needs sedation or lying flat.
  • Myeloid markers (CD13, CD33) do not exclude B-ALL; myeloperoxidase does. Mixed-phenotype leukaemia and CML in lymphoid blast phase are differentials.
03 Diagnosis, workup & staging essentials
The first 24–48 hours: safety first, then the tests that decide treatmentNow (hours)• CBC, smear, PT/aPTT, fibrinogen, D-dimer• Potassium, phosphate, calcium, urate, creatinine, LDH• Chest X-ray; CT if cough, chest pain or a widened mediastinum• Fever: cultures and antibiotics at once• Mass: airway, SVC and pericardium firstWithin 24–48 hours• Marrow: morphology, flow, karyotype, FISH• BCR::ABL1 by RT-PCR or FISH• Ph-like screen where available• Store the diagnostic sample for MRD• Mass, little marrow disease: core or excision biopsyBefore induction starts• Central line with 2–3 lumens• ECG and echocardiogram• HBV, HCV, HSV, CMV; pregnancy test• Sperm banking, fertility counselling• HLA type the patient and siblingsTumour lysis: ALL is HIGH risk with WBC ≥100,000/µL or LDH ≥2× the upper limit, otherwise INTERMEDIATE (never low). High risk:IV fluids + rasburicase (not in G6PD deficiency); intermediate: fluids + allopurinol. A 3–7-day steroid prephase (withcyclophosphamide in some protocols) debulks very high counts.First lumbar puncture: once blasts have cleared from the blood, given with the first intrathecal dose; at once if there areneurological signs.
Figure 4. Initial steps (UpToDate induction reviews; tumour lysis risk groups from the UpToDate TLS review and Perissinotti 2023). No doses.

Making the diagnosis

  • Blood and marrow: CBC and smear, immunophenotyping of blood or marrow, and a marrow aspirate and biopsy with flow cytometry, karyotype and FISH.
  • Lineage: lymphoblasts are TdT-positive and myeloperoxidase-negative. B lineage: CD19, cytoplasmic CD79a and CD22. T lineage: cytoplasmic or surface CD3 with CD7. Antigen-receptor gene rearrangements are not lineage-specific, so immunophenotype decides.
  • ALL or LBL: ≥20% marrow blasts = ALL (with or without a mass); a mass with <20% marrow blasts = LBL. Biopsy a node or mediastinal mass (core or excision) only when blood, marrow or an effusion cannot give the diagnosis.
  • Genetics that change treatment now: BCR::ABL1 (RT-PCR or FISH, within days); KMT2A, hypodiploidy, complex karyotype and TP53 (risk and transplant decisions); Ph-like screen; CD20, CD19 and CD22 expression for antibody choice.
  • CNS: every patient needs a lumbar puncture, generally once blasts have cleared from the blood and together with the first intrathecal dose; urgent imaging and LP for neurological signs.
  • Before treatment: echo and ECG; HBV, HCV, HSV and CMV serology; pregnancy test; fertility counselling and sperm banking (induction does not usually cause sterility in younger patients); HLA typing of transplant-eligible patients and their siblings; a central line with 2–3 lumens.
Is it ALL, and which lineage? Flow cytometry first, genetics within daysBlasts on smear or marrow → flow cytometry: TdT positive, myeloperoxidase negative = lymphoblastsB lineage (about 75%)• CD19, cytoplasmic CD79a and CD22• CD10 ± (CD10− = pro-B, high risk)• CD20 >10–20% of blasts in ~40%• CD13/CD33 may be presentT lineage (about 25%)• Cytoplasmic or surface CD3, CD7• CD1a, CD2, CD5, CD4/CD8 vary• ETP: CD1a−, CD8−, weak CD5 with stem or myeloid markers• Only surface CD3 is lineage-specificNot ALL• MPO positive: AML• TdT negative, MYC: Burkitt• Keratin+ mixed thymocytes: thymoma• Polyclonal TdT+ cells: indolent T-lymphoblastic proliferation• Recovering marrow: hematogonesGenetics: banded karyotype + FISH (ETV6::RUNX1 is cryptic on banding; KMT2A, BCR::ABL1), RT-PCR for BCR::ABL1 p190/p210 withindays, a Ph-like screen (CRLF2 by flow, fusion panel or RNA sequencing), and NGS where available (TP53). Keep diagnosticmaterial: PCR-based MRD needs it.
Figure 5. Work-up (UpToDate B-ALL and T-ALL diagnosis, classification and MRD reviews).
The central nervous system: grade it, protect it, treat itCNS-1• No lymphoblasts in spinal fluid• Prophylaxis per protocolCNS-2• Lymphoblasts with <5 WBC/µL• Prophylaxis per protocol• No routine cranial RTCNS-3• Lymphoblasts with ≥5 WBC/µL, or cranial nerve palsy• More frequent intrathecal therapy until clear• ± cranial RT 18 Gy laterTraumatic tap with blasts in blood: if the spinal-fluid WBC:RBC ratio is at least twice the blood ratio, call it CNS-3.Prophylaxis uses intrathecal methotrexate, cytarabine ± steroid and CNS-penetrating systemic drugs (high-dose methotrexate,cytarabine, asparaginase) as the protocol defines. In 1,508 adults, 5% had CNS disease at diagnosis; 90% still reached remissionand survival did not differ significantly.
Figure 6. CNS (UpToDate Ph-negative induction and relapsed/refractory reviews). Radiotherapy in Gy only.

Not ALL: the differentials to exclude

  • AML (myeloperoxidase-positive; Auer rods) and mixed-phenotype acute leukaemia.
  • Burkitt lymphoma/leukaemia: mature B cells (surface immunoglobulin, TdT-negative) with MYC rearrangement; treated differently (see the aggressive B-cell module).
  • Thymoma (type B1): a mediastinal mass with many immature T cells, but keratin-positive epithelium and polyclonal thymocytes of all stages.
  • Indolent T-lymphoblastic proliferation: TdT-positive but non-clonal, normal-pattern T cells, often in the upper aerodigestive tract.
  • T-lymphoblastic lymphoma with eosinophilia: a myeloid/lymphoid neoplasm with a tyrosine-kinase gene rearrangement (PDGFRA/PDGFRB) that responds to TKIs.
  • Reactive: hematogones in regenerating marrow, infections, and CML in lymphoid blast phase (BCR::ABL1 with a chronic-phase history).
04 Biology and biomarkers that change treatment

Biology in brief

  • B-ALL is classified by genetics (WHO 5th edition and ICC 2022 differ only modestly). Up to 30% of cases lack a defined subgroup; RNA sequencing finds further fusions (DUX4, ZNF384, MEF2D and others), especially in young adults.
  • Ph-like ALL has the expression profile of BCR::ABL1 ALL without the fusion; most cases carry kinase-activating changes (ABL-class, JAK2, CRLF2 with JAK-STAT or RAS mutations). It is 10–13% of childhood, about 21% of adolescent and up to one-third of adult B-ALL; frequency data: Roberts 2017[6]. In one single-institution series of 148 adults, five-year survival was 23% with Ph-like ALL vs 59% for other Ph-negative B-ALL. Targeted drugs are being tested; enrol in trials.
  • T-ALL: NOTCH1/FBXW7 activation, TAL1 and other transcription-factor rearrangements, and CDKN2A deletion are typical. In adults, NOTCH1/FBXW7 mutation without RAS or PTEN changes (about half) predicts longer survival (Trinquand 2013[7]); TP53 mutation (10–15%) predicts resistance. Early T-cell precursor (ETP) ALL is 5–10% of adult T-ALL and historically high risk (Jain 2016[8]); it depends on BCL-2, which is why venetoclax is studied.
  • Outcome in adult T-ALL: in UKALL XII/ECOG 2993 (356 adults) CR was 94% and 5-year survival 48%; survival after relapse was only 6.5% (Marks 2009[9]).
The genetic map changes with age: children vs adults (B-ALL, approximate % of cases)ChildrenAdultsBCR::ABL1 (Ph+)~5%25–30%Ph-like (BCR::ABL1-like)10–13%20–33%ETV6::RUNX115–25%3–4%High hyperdiploidyup to 25%<10%Favourable in children: hyperdiploidy and ETV6::RUNX1. Adverse: BCR::ABL1 (now treated with TKIs), Ph-like, KMT2A rearrangement(5–7% overall; 60–80% of infants), hypodiploidy (<5%), iAMP21 (2%, older children) and TP53 mutation.T-ALL: NOTCH1/FBXW7 mutation without RAS/PTEN changes (about half of adults) predicts longer survival; TP53 mutation (10–15%)and ETP phenotype (5–10% of adult T-ALL) predict failure.
Figure 7. Subtype frequencies (UpToDate classification/cytogenetics, MRD-detection and T-ALL reviews; Roberts 2017; Trinquand 2013). Bars show mid-points of the published ranges.
Ph-negative ALL in adults: who is high risk?High risk (any one)• Age over 60• WBC >30,000/µL (B) or >100,000/µL (T)• t(4;11) KMT2A::AFF1 or t(1;19)• Ph-like signature• Pro-B (CD10-negative) blasts• More than 4 weeks to remission• MRD ≥10⁻⁴ after inductionStandard risk• None of the high-risk features• Other favourable signs: age <30, WBC <30,000, mediastinal mass, T phenotype• Old trial (UKALL XII/ECOG 2993): 5-year OS 54% standard vs 29% high riskMRD is the strongest single predictor (GMALL)5-year OS, MRD-negative by week 1680%5-year OS, MRD-positive by week 1642%Relapse by 3 years, MRD >10⁻⁴ at day 24 and week 1694%
Figure 8. Risk (modified Hoelzer criteria in the UpToDate post-remission review; Goldstone 2008; Gökbuget 2012; Brüggemann 2006).
MRD: how deep can each test see? (one leukaemic cell among …)Microscopy ("complete remission")20 cellsExpert microscopy100Flow cytometry, 6–8 colours10,000RQ-PCR: Ig/TCR or fusion gene100,000NGS of Ig/TCR rearrangements1,000,000Where• Marrow preferred for B-ALL: blood is 1–3 logs lower• T-ALL: blood and marrow similar• First 2–5 mL of the aspirateWhen• End of induction• After consolidation• Before and after transplant• Ph+: BCR::ABL1 qPCR seriallyWhat it changes• ≥10⁻⁴ = high risk• Blinatumomab clears MRD in about 78%• Persistent MRD → transplant• Reappearance: confirm on a second sample"MRD-negative" means below the limit of that test: a decision needs an assay that reaches 10⁻⁴ on a good first-pull sample. MRDnegativity halves the risk of death or more (hazard ratio for survival 0.28 in adults; 39 studies, 13,637 patients).
Figure 9. MRD (UpToDate MRD detection and clinical-use reviews; Berry 2017; Gökbuget 2018). Bar length is on a log scale.

Markers that change treatment

MarkerFrequencyWhat it changes
BCR::ABL1 (Ph+)25–30% of adults; ~5% of childrenTKI in every phase; MRD by BCR::ABL1 qPCR; transplant decisions
Ph-like / CRLF2Up to one-third of adultsHigh risk; trials of ABL/JAK inhibitors
KMT2A rearrangement5–7%; most infantsHigh risk (favour transplant); revumenib at relapse
Low hypodiploidy, complex karyotype, TP53UncommonHigh risk; favour transplant in first remission
CD20 on >10–20% of blastsAbout 40% of B-ALLAdd rituximab (under 65)
CD19 / CD22Nearly all B-ALL / >90%Blinatumomab, CAR-T / inotuzumab; check again at relapse (antigen loss)
ETP phenotype; NOTCH1/FBXW7, RAS/PTEN5–10% of adult T-ALLPrognosis; trials (venetoclax)
MRD after inductionPositive in many adults≥10⁻⁴: blinatumomab, then transplant if fit
TPMT / NUDT15Variants in a minorityThiopurine (6-mercaptopurine) dose in maintenance (CPIC 2019[10])
05 Local therapy: radiotherapy, surgery & procedures

Radiotherapy

  • CNS leukaemia (CNS-3 or cranial nerve palsy): more frequent intrathecal therapy until the spinal fluid clears; cranial RT can be added in later phases, typically 18 Gy in 1.8–2.0 Gy fractions to the whole brain and the posterior globes, down to C2, as the protocol defines. It is not used routinely for CNS-1 or CNS-2 disease in current adult protocols.
  • CNS relapse: cranial RT 24 Gy (2 Gy fractions) with at least six intrathecal treatments.
  • Testes: examine at diagnosis; testicular disease that has not resolved by the end of induction → RT 24 Gy to both testes, usually with the first maintenance cycle.
  • India: some Indian centres still give prophylactic cranial RT (12 Gy) to adults on BFM-type protocols to lower CNS relapse, accepting the late effects (Ganesan 2021[5]). This is a protocol decision, not routine practice in current Western adult regimens.
  • Residual mediastinal mass in lymphoblastic lymphoma: the supplied sources do not settle whether mediastinal RT is needed; follow the protocol and discuss at the tumour board (question for Dr. Haritha in review).

Procedures and their pitfalls

  • Mediastinal mass: assess the airway, SVC and pericardium before any sedation, anaesthesia or lying flat; get the diagnosis from the least invasive source (blood, marrow, pleural fluid).
  • Central line: two or three lumens at the start of treatment. Catheters (especially PICC lines) carry about half of asparaginase-related thromboses (Mort 2025[11]).
  • Lumbar puncture: correct platelets and clotting first; perform it once blasts have cleared from the blood, together with the first intrathecal dose.
  • Marrow at count recovery: neutrophils >1,000/µL and platelets >100,000/µL; send the first 2–5 mL of the aspirate for MRD (later pulls are diluted with blood).
  • Before high-dose methotrexate: drain pleural effusions and ascites where feasible; they act as a reservoir and delay clearance.
06 Systemic therapy: indications & options

Ph-negative ALL: induction

Ph-negative ALL: induction is chosen by age and fitness, not by lineageFit, ≤40 years• Paediatric-inspired, asparaginase-rich (CALGB 10403, DFCI)• CALGB 10403: 3-year OS 73%, treatment deaths 3%• Cure 60–80%• Obesity worsens resultsFit, 40–65 years• Asparaginase regimen (E1910, GRAALL-2005) or hyper-CVAD• GRAALL-2005: CR 92%, 5-year OS 59%• Hyper-CVAD + rituximab: 3-year OS 50%• Choose by toxicity and experienceOlder or unfit B-ALL• Inotuzumab + dexamethasone (>55 years): 3-year OS 73%• Mini-hyper-CVD + inotuzumab: 3-year OS 56%; liver VOD 8%• Mini-hyper-CVD + venetoclax (also T-ALL)• Frail: vincristine + steroid, POMPEveryone• CD20+, under 65: add rituximab• CNS prophylaxis from the first LP• Steroid prephase if count very high• Marrow and MRD at count recoveryRituximab (GRAALL-2005/R, ≥8 doses): 4-year EFS 55% vs 43%, fewer relapses, no overall survival difference. Inotuzumab is notfor T-ALL (no CD22). Nelarabine helped children and young adults with T-ALL (COG AALL0434: 5-year DFS 88% vs 82%) but has notimproved outcomes in adults.
Figure 10. Induction (UpToDate Ph-negative induction review; Stock 2019; Huguet 2018; Thomas 2010; Stelljes 2024; Kantarjian 2018; Maury 2016; Dunsmore 2020). No doses.
  • Principles: induction is chosen by age and fitness; immunophenotype and genetics do not change it in fit adults up to 65, except rituximab for CD20+ disease (and a TKI for Ph+). Follow one published protocol closely, in a centre that can manage asparaginase and its complications.
  • Up to about 40 years: paediatric-inspired, asparaginase-rich regimens (CALGB 10403[12]: 295 patients aged 17–39, 3-year survival 73%, treatment deaths 3%, a quarter with raised liver enzymes, 5% thromboses; DFCI[13]: CR 85%). Older adult-type regimens gave 5-year survival near 30%.
  • 40–65 years: an asparaginase regimen (E1910; GRAALL-2005[14]: CR 92%, 5-year survival 59%) or hyper-CVAD (with rituximab[15]: CR 95%, 3-year survival 50%). Asparaginase regimens bring liver, pancreas and clotting problems; hyper-CVAD more neutropenia and admissions.
  • Rituximab: adding at least 8 doses for CD20+ B-ALL in patients under 65 improved 4-year EFS (55% vs 43%) without more toxicity (GRAALL-2005/R[16]); four doses without CD20 selection did not help (UKALL14[17]). In India cost often limits it (Ganesan 2021[5]).
  • Response: CR = marrow blasts <5%, cellularity >25% and normal counts; assess MRD at CR. No CR after induction = refractory disease (see relapse below).

Ph-negative ALL: after remission

Ph-negative ALL in first remission: risk and MRD decideComplete remission → risk group + MRD (assay ≤10⁻⁴) + donor + fitnessStandard risk• Consolidation chemotherapy + blinatumomab• E1910: 3-year OS 85% vs 68%• Then maintenance for ≥2 years• Used whatever the MRD levelHigh risk, MRD-negative• Chemo-immunotherapy + maintenance, or allogeneic HCT• Similar survival; HCT has more toxicity• Favour HCT: t(4;11), complex karyotype, low hypodiploid, TP53, WBC >70,000MRD-positive (≥10⁻⁴)• Blinatumomab, 1–2 cycles (MRD cleared in 78%)• Fit: allogeneic HCT• Not fit: chemo-immunotherapy + maintenance• GRAALL: HCT helped only if MRD ≥10⁻³Maintenance: daily oral 6-mercaptopurine and weekly methotrexate, often with vincristine–steroid pulses, for 2–3 years. Ifcounts fall on standard doses, check TPMT and NUDT15. Outcomes are better when maintenance keeps counts suppressed. Pneumocystisprophylaxis; no live vaccines; yearly influenza vaccine for the patient and family.
Figure 11. After remission (UpToDate post-remission review; Litzow 2024; Gökbuget 2018; Dhédin 2015; Relling 2019).
  • Standard risk: consolidation chemotherapy plus blinatumomab, rather than chemotherapy alone, blinatumomab alone or transplant. In E1910 (224 adults aged 30–70 in MRD-negative CR, 57% with high-risk features) blinatumomab raised 3-year survival from 68% to 85% (hazard ratio 0.41); grade ≥3 neuropsychiatric events 23% vs 5% (Litzow 2024[1]). UpToDate applies this to all patients in CR, whatever the MRD.
  • High risk, MRD-negative: chemo-immunotherapy plus maintenance or allogeneic HCT are both acceptable; many favour HCT for t(4;11), complex karyotype, low hypodiploidy/near-triploidy, TP53 or WBC >70,000/µL.
  • MRD-positive (≥10⁻⁴): one or two cycles of blinatumomab (78% of 113 patients became MRD-negative; responders lived longer, 39 vs 13 months) and then allogeneic HCT if eligible (BLAST[2]). In GRAALL, transplant helped patients with MRD ≥10⁻³ (survival HR 0.43) but not those below (Dhédin 2015[18]).
  • Maintenance: low-intensity treatment for at least 2 years (daily 6-mercaptopurine, weekly methotrexate, often vincristine–steroid pulses); test TPMT and NUDT15 when counts fall on standard doses; better outcomes when counts are kept suppressed.

Allogeneic transplant

Allogeneic transplant in first remission: fewer relapses, more treatment deathsUKALL XII/ECOG 2993 · standard riskSibling donor vs no donor · 5-year OS (%)6252UKALL XII/ECOG 2993 · standard riskSibling donor vs no donor · 2-year non-relapse deaths (%)207UKALL XII/ECOG 2993 · high riskSibling donor vs no donor · relapse (%)3763UKALL XII/ECOG 2993 · high riskSibling donor vs no donor · 2-year non-relapse deaths (%)3614CIBMTR · first CR, matched agesPaediatric-inspired chemo vs allograft · 4-year OS (%)7345Teal = first-named arm; grey = comparator. Old trials, before MRD and blinatumomab; compare within a row.Donors: only about a quarter have a matched sibling; matched unrelated, haploidentical (post-transplant cyclophosphamide) andcord grafts give comparable results. Reduced-intensity conditioning for older or less fit patients; most centres limit HCT tofit patients under about 70–75 years. Survival benefit of HCT in the meta-analysis was confined to patients under 35.India: transplant beds are limited and waiting lists long; JIPMER offers first-remission HCT mainly for Ph+, KMT2A-rearrangedand persistently MRD-positive disease, guided by donor, cost and the family's ability to stay near the centre (Ganesan 2021).
Figure 12. Transplant evidence (Goldstone 2008; Gupta 2013; Seftel 2016; UpToDate post-remission reviews; Ganesan 2021).
  • Evidence: in UKALL XII/ECOG 2993, sibling-donor HCT improved 5-year survival in standard-risk disease (62% vs 52%) at the cost of more non-relapse deaths (20% vs 7%); in high-risk disease fewer relapses (37% vs 63%) were offset by non-relapse mortality (36% vs 14%) (Goldstone 2008[19]). The survival gain was confined to patients under 35 in a meta-analysis (Gupta 2013[20]), and paediatric-inspired chemotherapy outperformed matched allografts in a CIBMTR comparison (4-year survival 73% vs 45%; Seftel 2016[21]).
  • Donors and grafts: matched sibling or unrelated donor preferred; haploidentical (post-transplant cyclophosphamide) and cord grafts give comparable results; peripheral blood grafts for most adults; reduced-intensity conditioning for older or less fit patients.

Older or unfit adults

  • B-ALL: inotuzumab plus dexamethasone in patients over 55 (CR in all 43, 3-year survival 73%; Stelljes 2024[22]); mini-hyper-CVD plus inotuzumab (median age 68: CR 85%, 3-year survival 56%, liver VOD 8%, treatment deaths 12%; Kantarjian 2018[23]); mini-hyper-CVD plus venetoclax (Luskin 2025[24]).
  • T-ALL: mini-hyper-CVD plus venetoclax (expert opinion; inotuzumab does not work without CD22).
  • Frail: vincristine with prednisone, or POMP, can control the disease for a time. Talk honestly: in India, curative attempts in older patients with comorbidities often end in intensive-care admissions and early relapse (Ganesan 2021[5]).

T-ALL and lymphoblastic lymphoma

  • T-ALL is treated with the same induction as B-ALL (no B-cell antibodies). Nelarabine improved 5-year DFS (88% vs 82%) and cut CNS relapse (1% vs 7%) in children and young adults up to 31 (COG AALL0434[25]) but has not improved outcomes in adults; adding it to hyper-CVAD gave no benefit over historical controls.
  • Lymphoblastic lymphoma (mostly T-LBL with a mediastinal mass): stage with marrow and lumbar puncture, then treat on the ALL protocol of that lineage with full CNS prophylaxis; COG AALL0434 included T-LBL. About 60% of T-LBL later infiltrate the marrow. Whether a residual mediastinal mass needs RT is not settled by the supplied sources (see section 05).
  • Testes and CNS: both are involved more often in T-ALL; examine and grade at diagnosis.
  • India: a low-cost protocol at CMC Vellore gave 51% 5-year survival in 113 adults with T-ALL (Abraham 2014[26]).

Ph-positive ALL

Ph-positive ALL: a TKI from day 1 to the end, with gentle partnersBCR::ABL1 found → start a TKI now; baseline BCR::ABL1 qPCR; heart, bleeding and effusion historyWhich TKI• Dasatinib: favoured; avoid with effusion, bleeding, heart failure• Imatinib: generic, cheaper, slower• Ponatinib: T315I; deeper responses; vascular risk• Nilotinib: an alternativeWith what• A steroid alone, or• Low-intensity chemotherapy (vincristine + steroid)• Not hyper-CVAD intensity: early deaths 1% vs 7% (GRAAPH-2005)• Chemotherapy-free: dasatinib-steroid → blinatumomab (D-ALBA)After remission• BCR::ABL1 qPCR after 1–2 consolidations• Falling, fit: allogeneic HCT• Negative: finish consolidation or HCT• Rising: kinase-domain mutation test, switch TKIPhALLCON: ponatinib vs imatinib with reduced-intensity chemotherapy, MRD-negative CR 34% vs 17% and median PFS 20 vs 8 months(survival data awaited). After HCT keep the TKI ≥1 year; without HCT, TKI + low-intensity maintenance for 24–30 months. About 1in 4 MRD-negative patients still relapse.India: generic dasatinib had become available by 2021, while ponatinib was not marketed in India then (Ganesan 2021): checkcurrent access before choosing.
Figure 13. Ph-positive ALL (UpToDate Ph+ induction and post-remission reviews; Chalandon 2015; Foà 2020; Jabbour 2024; Ganesan 2021). No doses.
  • A TKI is essential but not enough: TKI-based induction gives CR above 90% and long-term survival around 50%, against ≤20% with chemotherapy alone; pair it with a steroid or chemotherapy, and continue it through every phase.
  • Gentle partners: in GRAAPH-2005 (268 adults) imatinib with vincristine–dexamethasone gave more CRs (98% vs 91%) and fewer early deaths (1% vs 7%) than imatinib with hyper-CVAD, with equal 5-year survival (Chalandon 2015[3]). Older patients: dasatinib with low-intensity chemotherapy (median age 69: CR 96%, 5-year survival 36%; EWALL-PH-01[27]).
  • Chemotherapy-free: dasatinib plus a steroid gave CR in 98% (LAL1205[28]); followed by blinatumomab, MRD negativity rose from 29% to 60% (D-ALBA[4]). Relapses on dasatinib often carry T315I.
  • Which TKI: dasatinib is favoured (some CNS penetration; avoid with effusions, bleeding, heart failure); imatinib is generic and cheaper but slower; ponatinib covers T315I and gave more MRD-negative CRs than imatinib (34% vs 17%; PhALLCON[29]; with hyper-CVAD 3-year EFS 70%, Jabbour 2018[30]) at a cost of arterial events.
  • After remission: one or two consolidations, then BCR::ABL1 MRD. Falling MRD and fit → allogeneic HCT; MRD-negative → finish consolidation or transplant (no survival difference in a retrospective study of 230 patients; Ghobadi 2022[31]); rising MRD → kinase-domain mutation test and a TKI switch. TKI for ≥1 year after HCT; without HCT, TKI plus low-intensity maintenance for 24–30 months.

Relapsed or refractory ALL

Relapsed or refractory ALL: choose by antigen, genetics and lineage, then transplantB-ALL, CD19+ or CD22+• Blinatumomab: median OS 7.7 vs 4.0 months (TOWER)• Inotuzumab: CR 81% vs 29%, MRD-negative 78% (INO-VATE); VOD 9%• CAR-T: see next figureCD19− and CD22−• KMT2A-rearranged: revumenib (response 63%, CR 23%)• Watch differentiation syndrome (16%) and QT• Others: chemotherapy by fitness• Relapse ≥3 years: repeat first regimenPh+• Kinase-domain mutation test• Second-generation TKI, asciminib, or ponatinib (T315I)• Plus immunotherapy or chemotherapyT-ALL• Nelarabine-based: CR 36%, 1-year OS 37% (CAMPUS ALL)• Neurotoxicity: stop for grade ≥2• Bridge to allogeneic HCTEveryone: lumbar puncture and CNS prophylaxis; examine the testes; HLA typing and donor search at once. Allogeneic HCT in secondremission is the usual cure, best when MRD-negative. Isolated CNS relapse: intrathecal therapy + cranial RT 24 Gy. Residualtesticular disease: RT 24 Gy to both testes.
Figure 14. Relapse (UpToDate adult relapsed/refractory review; Kantarjian 2017; Kantarjian 2016; Issa 2025; Candoni 2020).
CD19 CAR-T cells in relapsed B-ALL: grade ≥3 toxicity (%)Cytokine release syndromeNeurotoxicity (ICANS)Tisagenlecleucel≤25 years · 12-month OS 76%; responses 81%4613Brexucabtagene autoleucelAdults · CR 56% + CRi 15%; median OS >18 months2425Obecabtagene autoleucelAdults · CR 55% + CRi 21%; 12-month OS 61%2.47.1Obecabtagene uses a lower-affinity CD19 binder: much less severe CRS and ICANS. All CAR-T products also cause prolongedcytopenias, low immunoglobulins and infections; tocilizumab must be on hand. CRS and ICANS grading and treatment: see theAggressive B-cell Lymphomas module.India: NexCAR19 (ImmunoACT with IIT Bombay and Tata Memorial) received CDSCO approval on 13 October 2023 for relapsed orrefractory B-cell lymphoma and leukaemia.
Figure 15. CAR-T (Maude 2018; Shah 2021; Roddie 2024; UpToDate adult relapsed/refractory review; NexCAR19 pivotal trial, verified 16 Oct 2026). Trials differ: do not rank products from this chart.
  • Blinatumomab (CD19×CD3): median survival 7.7 vs 4.0 months over chemotherapy in 405 adults with relapsed Ph-negative ALL, with better quality of life; grade ≥3 CRS 5% (TOWER[32]).
  • Inotuzumab ozogamicin (CD22 conjugate): CR 81% vs 29% and MRD negativity 78% vs 28%, 2-year survival 23% vs 10%; hepatic VOD 9% vs 1%, and 10 of 48 transplanted patients developed VOD (INO-VATE[33]). Avoid giving it immediately before HCT if possible.
  • CD19 CAR-T: tisagenlecleucel up to 25 years (ELIANA[34]), brexucabtagene in adults (ZUMA-3[35]), obecabtagene with much less severe CRS and ICANS (FELIX[36]). CRS and ICANS management is described in the Aggressive B-cell Lymphomas module. India: NexCAR19 is approved for relapsed B-cell lymphoma and leukaemia (NexCAR19 trial[37]).
  • CD19- and CD22-negative: these relapses are increasing after frontline antibodies. KMT2A-rearranged → revumenib (57 patients: response 63%, CR 23%; differentiation syndrome 16%; AUGMENT-101[38]); others → chemotherapy by fitness; relapse ≥3 years after diagnosis → the first regimen again.
  • T-ALL: nelarabine-based chemotherapy (118 adults: CR 36%, 1-year survival 37%; 38% 5-year survival after HCT; Candoni 2020[39]), then HCT. Ph+: a TKI chosen by mutation testing plus immunotherapy or chemotherapy.
  • After second remission: allogeneic HCT for the fit, best when MRD-negative; CNS prophylaxis for everyone. In India, salvage is usually offered only when transplant is realistic (Ganesan 2021[5]).

ALL-specific supportive care and toxicity

Asparaginase: the drug that makes paediatric-style regimens work, and how to keep it safeAllergy and silent inactivation• Give only where anaphylaxis can be treated• Pegylated form: less immunogenic• Check activity: day 7 <0.1 IU/mL or nil at day 14 = inactivation• Switch to an Erwinia productLiver, pancreas, metabolism• Raised transaminases common (two-thirds on some regimens)• Pancreatitis• High glucose and triglycerides• Worse with BMI >30 or fatty liver• Avoid other liver toxins while activeClots and bleeding• Low antithrombin, protein C/S, fibrinogen• Thrombosis in 14% of adults (half catheter-related)• Cerebral sinus thrombosis• Fibrinogen often <100 mg/dLISTH guidance: consider prophylactic LMW heparin while platelets are ≥30,000/µL (data are retrospective and mixed: 14% vs 27%VTE in one study, no difference in another); weekly antithrombin with replacement below 50–60%. Treat VTE with LMW heparin(anti-Xa monitoring) for ≥6 months; hold asparaginase for cerebral sinus thrombosis, large PE, proximal DVT or arterial clots,and consider resuming after about 4 weeks.India: pegylated asparaginase from Indian manufacturers has lowered cost but remains dearer than native asparaginase; JIPMERlimits asparaginase above 50–60 years (Ganesan 2021).
Figure 16. Asparaginase (UpToDate Ph-negative induction and antithrombin deficiency reviews; Zwicker 2020; Sibai 2020; Mort 2025; Wetzler 2007; Ganesan 2021). No doses.
Other drugs, other dangers: what ALL treatment does beyond the marrowVincristine• Neuropathy in nearly all; constipation, colic, ileus• Azoles and other CYP3A4 inhibitors make it worse• Avoid in Charcot-Marie-ToothHigh-dose methotrexate• Hydrate; keep urine pH ≥7; drain effusions and ascites first• Stop NSAIDs, PPIs, penicillins, ciprofloxacin and TKIs if possible• Leucovorin until the level is <0.05–0.1 µM• Kidney injury: glucarpidase within 48–60 hSteroids, cytarabine, nelarabine• Dexamethasone: osteonecrosis (adolescents), infection, mood, high glucose• High-dose cytarabine: cerebellar syndrome (10–25%)• Nelarabine: neuropathy; stop for grade ≥2Antibodies and CAR-T• Blinatumomab: CRS; grade ≥3 neurotoxicity 7–14%• Inotuzumab: liver VOD, especially before HCT• CAR-T: CRS, ICANS, cytopenias, low IgGMethotrexate neurotoxicity: acute somnolence or seizures within 24 hours of high doses; a subacute stroke-like episode 2–14 daysafter intrathecal or high-dose treatment that usually resolves (3.8% of 369 children); later leukoencephalopathy, especiallyafter cranial RT. Rechallenge is usually possible after a transient episode.
Figure 17. Toxicity (UpToDate neurotoxicity, high-dose methotrexate, relapsed/refractory and SOS reviews; Ramsey 2018). No doses.
  • Tumour lysis: ALL with WBC ≥100,000/µL or LDH ≥2× the upper limit is high risk (IV fluids plus rasburicase, not in G6PD deficiency; monitor closely, ICU if kidney function is poor); all other ALL is intermediate risk (fluids plus allopurinol) (Perissinotti 2023[40]; Coiffier 2008[41]). With steroid-based induction, hypotonic dextrose-saline is favoured because steroids retain sodium.
  • Asparaginase: give only where anaphylaxis can be treated; check activity (silent inactivation) and switch preparation if needed; asparagine depletion predicts better outcome (Wetzler 2007[42]). Thrombosis in 14% of adults; ISTH suggests LMW-heparin prophylaxis while platelets are ≥30,000/µL and antithrombin replacement below 50–60% (Zwicker 2020[43]); evidence is mixed (Sibai 2020[44]; Mort 2025[11]).
  • High-dose methotrexate: hydrate, alkalinise, drain third spaces, stop interacting drugs (NSAIDs, proton-pump inhibitors, penicillins, ciprofloxacin, TKIs), monitor levels, rescue with leucovorin, and use glucarpidase within 48–60 hours when levels stay high with kidney injury (Ramsey 2018[45]). Acute kidney injury still occurs in about 2%.
  • Vincristine: avoid azole antifungals around doses where possible (severe neuropathy, ileus); some Indian centres stop voriconazole for 24 hours before each dose (Ganesan 2021[5]).
  • Liver VOD/SOS: think of it after inotuzumab or HCT (weight gain, ascites, tender liver, rising bilirubin, platelet refractoriness); diagnose with EBMT criteria (Mohty 2016[46]); ursodeoxycholic acid prophylaxis around HCT; defibrotide for severe disease.
  • Blood products and infection: keep haemoglobin around 8–9 g/dL; prophylactic platelets below 10,000/µL; leukodepleted products, irradiated for transplant candidates, CMV-negative for CMV-negative candidates; Pneumocystis prophylaxis; no live vaccines; influenza vaccine for patient and family.

Emergencies shared with AML

  • Leukostasis, DIC, neutropenic fever and antibacterial/antifungal prophylaxis are covered once, in the AML module, emergencies section.
  • Specific to ALL: the mediastinal mass (airway, SVC, pericardial tamponade), high-risk tumour lysis, asparaginase thrombosis and bleeding, methotrexate kidney injury, and CRS or neurotoxicity with blinatumomab and CAR-T.

India: check availability and cost before planning

  • Generic imatinib and dasatinib are used widely; ponatinib was not marketed in India in 2021 (Ganesan 2021[5]). Check current access to ponatinib, asciminib, blinatumomab, inotuzumab, revumenib, nelarabine, Erwinia asparaginase and rituximab, and their cost, at the start of treatment.
  • NexCAR19 (CDSCO approval 13 October 2023) is an Indian CD19 CAR-T option for relapsed B-ALL; eligibility, centres and cost should be checked case by case.
  • MRD testing (flow at 10⁻⁴ or PCR) and transplant beds are concentrated in a few centres: plan referrals at diagnosis, not at relapse.
  • Abandonment (11–15%) and interruptions are major causes of failure: involve social workers and counsellors, and agree a written plan for the 2–3 years of treatment.

Quick reference (also as a printable PDF on the Printable Teaching Resources page)

Table A. Diagnosis and work-up tests and what they change

TestWhenWhat it changesPitfalls
CBC + smear reviewEvery suspected caseLymphoblasts; cytopeniasWhite count may be low, normal or very high
PT, aPTT, fibrinogen, D-dimerAt diagnosis; during asparaginaseBleeding and clot riskAsparaginase lowers fibrinogen and antithrombin
Potassium, phosphate, calcium, urate, creatinine, LDHBefore and during inductionTLS risk: high if WBC ≥100,000/µL or LDH ≥2× upper limitALL is never low risk for TLS
Flow cytometry (blood or marrow)AllB vs T lineage; CD19, CD20, CD22 for antibody choice; MRD baselineOnly surface CD3 is T-lineage specific; MPO+ = AML
Karyotype + FISH; RT-PCR BCR::ABL1All, within daysPh+ → TKI at once; KMT2A, hypodiploidy = high riskETV6::RUNX1 is cryptic on banding
Ph-like screen (CRLF2 flow, fusion panel, RNA sequencing); NGS for TP53B-ALL, where availableHigh-risk group; trials of ABL/JAK inhibitorsNot standard everywhere
Lumbar punctureWhen blasts clear from blood, with first intrathecal doseCNS-1/2/3 → intensity of CNS therapyTraumatic tap with blasts: compare WBC:RBC ratios
CT chest; biopsy of massMediastinal mass or LBLLBL if marrow blasts <20%; airway and SVC riskDiagnose from blood, marrow or effusion if possible
ECG, echo; HBV, HCV, HSV, CMV; pregnancy testBefore inductionAnthracycline and TKI choice; antiviral prophylaxisDasatinib/ponatinib: QT, effusions, vascular risk
HLA typing (patient and siblings)Transplant-eligible patients, at diagnosisDonor search for high-risk or MRD-positive diseaseOnly about a quarter have a matched sibling

Table B. Treatment by setting

SettingUsual approachAlternativesKey points
Ph−, fit, ≤40 yearsPaediatric-inspired asparaginase regimen (CALGB 10403, DFCI)Hyper-CVAD+ rituximab if CD20+; cure 60–80%
Ph−, fit, 40–65 yearsAsparaginase regimen (E1910, GRAALL-2005) or hyper-CVAD—Choose by toxicity, comorbidity and experience
Ph−, older or unfit B-ALLInotuzumab-based or mini-hyper-CVD-basedMini-hyper-CVD + venetoclax; vincristine + steroid; POMPWatch liver VOD with inotuzumab
Ph−, older or unfit T-ALLMini-hyper-CVD + venetoclaxVincristine + steroidNo inotuzumab (no CD22)
Ph−, CR, standard riskConsolidation chemotherapy + blinatumomab, then maintenance ≥2 yearsAllogeneic HCT (some experts, persistent MRD)E1910: 3-year OS 85% vs 68%
Ph−, CR, high risk, MRD-negativeChemo-immunotherapy + maintenance, or allogeneic HCT—Favour HCT for KMT2A, complex, low hypodiploid, TP53
Ph−, MRD-positiveBlinatumomab 1–2 cycles → allogeneic HCTChemo-immunotherapy + maintenance if not eligibleMRD cleared in about 78%
Ph+, any fitnessTKI + steroid or TKI + low-intensity chemotherapyTKI + blinatumomab (chemotherapy-free)TKI in every phase; avoid high-intensity chemotherapy
Ph+, in CRMRD-guided: allogeneic HCT if fit and MRD fallingConsolidation if MRD-negativeTKI ≥1 year after HCT; 24–30 months if no HCT
Relapsed B-ALL, CD19+/CD22+Blinatumomab, inotuzumab or CAR-TChemotherapyThen allogeneic HCT if eligible
Relapsed KMT2A-r; relapsed T-ALLRevumenib; nelarabine-based chemotherapyTrialThen allogeneic HCT
Lymphoblastic lymphomaSame protocol as ALL of that lineage—CNS prophylaxis; marrow and LP at staging

Table C. Treatment options: evidence and best fit

OptionBest fitEvidenceWatch for
Asparaginase-rich paediatric-inspired regimenFit adults, especially ≤40CALGB 10403[12]: 3-year OS 73%Liver, pancreatitis, thrombosis, allergy
Hyper-CVAD ± rituximabFit adults 40–65Thomas 2010[15]: 3-year OS 50%Neutropenia, infections, admissions
RituximabCD20+ (>10–20% of blasts), under 65GRAALL-2005/R[16]: 4-year EFS 55% vs 43%Infusion reactions; HBV reactivation
Blinatumomab (CD19×CD3)Consolidation; MRD-positive; relapseE1910[1]; BLAST[2]; TOWER[32]CRS, neurotoxicity; continuous infusion
Inotuzumab ozogamicin (CD22)Relapse; older adults in first lineINO-VATE[33]: CR 81% vs 29%Liver VOD (9%), especially before HCT
Dasatinib / imatinib / ponatinibPh+ ALL, all phasesPhALLCON[29]; D-ALBA[4]Effusions, QT, bleeding; ponatinib: arterial events
NelarabineRelapsed T-ALL; children/young adults first lineCandoni 2020[39]; AALL0434[25]Neuropathy, Guillain-Barré-like weakness
CD19 CAR-TRelapsed/refractory B-ALLELIANA[34]; ZUMA-3[35]; FELIX[36]CRS, ICANS, cytopenias, low IgG
Revumenib (menin inhibitor)Relapsed KMT2A-rearranged ALLAUGMENT-101[38]: response 63%Differentiation syndrome, QT
Allogeneic HCTHigh risk/MRD-positive CR1; Ph+; second remissionUKALL XII/ECOG 2993[19]; Dhédin 2015[18]Non-relapse mortality 15–35%; GVHD

Table D. Managing problems during treatment

ProblemCluesFirst stepsThen
Tumour lysisK, phosphate, urate up; calcium down; creatinine risingFluids; rasburicase if high risk (check G6PD)Do not give calcium for asymptomatic low calcium while phosphate is high
Neutropenic feverFever ≥38 °C, neutrophils lowCultures; broad antibiotics within the hourSee the AML module, emergencies section
Asparaginase thrombosisSwollen limb; headache, seizure (sinus thrombosis)Imaging; LMW heparin (anti-Xa); antithrombin if high-risk clotHold asparaginase; resume after about 4 weeks if judged safe
Asparaginase pancreatitis or allergyAbdominal pain, lipase; rash, wheezeStop the dose; treat anaphylaxisAllergy or silent inactivation → Erwinia product
Delayed methotrexate clearanceRising creatinine, high levelMore fluids, alkalinise, more leucovorin; stop interacting drugsGlucarpidase within 48–60 hours
Vincristine neuropathy, ileusTingling, constipation, crampsAvoid azoles near doses; bowel careDose changes per protocol
Blinatumomab or CAR-T reactionsFever, low BP; confusion, tremor, speech changeGrade CRS and ICANS; tocilizumab, steroidsSee the Aggressive B-cell Lymphomas module
Liver VOD/SOS (inotuzumab, HCT)Weight gain, ascites, tender liver, bilirubinEBMT criteria; fluid balance; avoid liver toxinsDefibrotide if severe
Myelosuppression on maintenanceLow counts on standard 6-mercaptopurineCheck TPMT and NUDT15Adjust per protocol
Steroid effectsHip or shoulder pain; high glucose; mood changeLook for osteonecrosis; control glucoseDiscuss steroid schedule with the protocol team
07 Management algorithms

Six decision paths pull together sections 02–06.

Algorithm 1Suspected ALL: the first 24–48 hours
Lymphoblasts on the smear, cytopenias, bone pain, nodes or a mediastinal mass → CBC and smear, PT/aPTT/fibrinogen, chemistry with urate, phosphate, LDH; chest X-ray
Emergencies now
Mass → airway, SVC, pericardium before any sedation
TLS: WBC ≥100,000 or LDH ≥2× ULN → rasburicase
Fever + neutropenia → antibiotics now
Leukostasis, DIC, infection: AML module
Confirm and classify
Flow: TdT+, MPO−
B → CD19, CD79a, CD22
T → CD3, CD7
BCR::ABL1 within days; karyotype, FISH
Mass + <20% marrow blasts = LBL
Plan
Age, fitness, comorbidity
Ph+ → Algorithm 4
Ph− → Algorithm 2
LP with the first intrathecal dose
HLA-type patient and siblings; fertility

All: central line · echo and ECG · HBV/HCV/HSV/CMV · leukodepleted, irradiated products for transplant candidates · referral to a leukaemia centre.

Algorithm 2Ph-negative ALL: induction by age, fitness and lineage
Ph-negative → fitness and comorbidity; CD20, CD22, T markers; CNS grade
Fit, ≤40 years
Paediatric-inspired, asparaginase-rich
CALGB 10403 or DFCI
+ rituximab if CD20+
Cure 60–80%
Fit, 40–65 years
Asparaginase regimen or hyper-CVAD
Asparaginase → liver, pancreas, clots
Hyper-CVAD → neutropenia
+ rituximab if CD20+
E1910 · GRAALL-2005
Older or unfit
B-ALL → inotuzumab-based or mini-hyper-CVD
T-ALL → mini-hyper-CVD + venetoclax
Frail → vincristine + steroid, POMP
Inotuzumab: watch liver VOD

All: CNS prophylaxis from the first lumbar puncture · marrow and MRD at count recovery · no CR → Algorithm 5.

Algorithm 3Ph-negative ALL in first remission
CR → risk group (age, WBC, genetics, time to CR) and MRD (assay ≤10⁻⁴); donor; fitness
Standard risk
Consolidation + blinatumomab
Maintenance ≥2 years
E1910: 3-year OS 85% vs 68%
High risk, MRD-negative
Chemo-immunotherapy + maintenance
or → allogeneic HCT
Favour HCT: KMT2A, complex, low hypodiploid, TP53
Similar survival, different toxicity
MRD-positive
Blinatumomab 1–2 cycles
Fit → allogeneic HCT
Not fit → chemo-immunotherapy + maintenance
BLAST: 78% cleared MRD

Maintenance: daily 6-mercaptopurine + weekly methotrexate ± vincristine–steroid pulses · TPMT/NUDT15 if counts fall · Pneumocystis prophylaxis · no live vaccines.

Algorithm 4Ph-positive ALL
BCR::ABL1 positive → TKI today; baseline BCR::ABL1 qPCR; heart, bleeding and effusion history guide TKI choice
Induction
TKI + steroid, or TKI + low-intensity chemo
Dasatinib → favoured
Imatinib → generic
Ponatinib → T315I
Not high-intensity chemo (GRAAPH-2005)
After 1–2 consolidations
BCR::ABL1 qPCR
Falling, fit → allogeneic HCT
Negative → finish consolidation or HCT
Rising → mutation test, switch TKI
Chemotherapy-free: blinatumomab (D-ALBA)
Maintenance
After HCT: TKI ≥1 year
No HCT: TKI + low-intensity chemo for 24–30 months
Retest MRD after consolidation or HCT
1 in 4 MRD-negative patients relapse

Frail: TKI + steroid · weak heart: avoid dasatinib, nilotinib and ponatinib where possible; no anthracycline if EF <30%.

Algorithm 5Relapsed or refractory ALL
Relapse or no CR → marrow flow (CD19, CD22, CD20), cytogenetics, KMT2A, BCR::ABL1 mutations; LP; testes; fitness; donor search now
B-ALL, CD19+ or CD22+
Blinatumomab, inotuzumab or CAR-T
Blinatumomab → CRS, neurotoxicity
Inotuzumab → VOD before HCT
TOWER · INO-VATE · ZUMA-3 · FELIX
Other subgroups
KMT2A-rearranged → revumenib
Ph+ → TKI by mutation + immunotherapy or chemo
T-ALL → nelarabine-based
CD19−/CD22−: chemotherapy by fitness
After remission
Fit → allogeneic HCT (best if MRD-negative)
Less fit → individual consolidation and maintenance
CNS prophylaxis for all
Multiply relapsed: clinical trial

Isolated CNS relapse: intrathecal + cranial RT 24 Gy · residual testicular disease: RT 24 Gy to both testes · relapse ≥3 years: first regimen again.

Algorithm 6Problems during treatment: what to do first
New symptom on ALL treatment → which drug, which day, counts and clotting
Asparaginase
Headache, seizure, weakness → urgent brain imaging
Clot → LMW heparin (anti-Xa); antithrombin if high-risk
Hold → consider resuming after ~4 weeks
Abdominal pain → lipase: pancreatitis
Allergy or no activity → Erwinia product
Methotrexate
High level or rising creatinine → more fluids, alkalinise, more leucovorin
Still high → glucarpidase within 48–60 h
Stroke-like episode 2–14 days later → usually resolves
Stop interacting drugs; drain effusions
Immunotherapy and others
Blinatumomab or CAR-T: fever, low BP → CRS
Confusion, tremor, speech → ICANS
Inotuzumab: weight gain, ascites, bilirubin → VOD (EBMT)
Vincristine + azole → neuropathy, ileus

Neutropenic fever, DIC, leukostasis: AML module emergencies section · CRS and ICANS grading: Aggressive B-cell Lymphomas module.

08 Survivorship, follow-up & late effects
After treatment: remission, MRD, follow-up and late effectsComplete remission• Marrow blasts <5%; cellularity >25%• Normal blood counts; no extramedullary disease• Marrow when neutrophils >1,000 and platelets >100,000/µLFollow-up• Examination, CBC, liver tests every 1–2 months in year 1• Every 3–6 months in year 2• Every 6–12 months after that• Final marrow + MRD at end of maintenanceLate effects• Neuropathy, cognition, osteonecrosis• Endocrine and fertility problems• Heart (anthracyclines)• Second cancers• After HCT: GVHD, infections, eyes, lungsIn German long-term survivors of adult ALL, two-thirds had a comorbidity: neurological (27%), endocrine (17% of men, 24% ofwomen) or skin problems; transplanted survivors had more late effects. Adherence matters: in Indian series 11–15% abandon orinterrupt therapy, and treatment delays cut relapse-free survival from 69% to 43% (Ganesan 2021).
Figure 18. Response and survivorship (UpToDate induction and post-remission reviews; childhood late-effects review; Ganesan 2021).
  • Adherence is treatment: maintenance runs for 2–3 years at home; non-adherence and abandonment occur in 11–15% of Indian ALL patients, and treatment delays lowered relapse-free survival from 69% to 43% in one Indian series (Ganesan 2021[5]).
  • Follow-up: physical examination, CBC and liver tests every 1–2 months in the first year after therapy, every 3–6 months in the second, then every 6–12 months; a final marrow with MRD at the end of maintenance and further marrows only if indicated.
  • Late effects: neuropathy (vincristine), cognitive and endocrine effects (especially after cranial RT), osteonecrosis (dexamethasone, adolescents), cardiomyopathy (anthracyclines), infertility, obesity and abnormal glucose metabolism, and second cancers. Transplanted survivors have more: chronic GVHD, infections, eye, lung, kidney and endocrine problems.
  • Prevention during and after treatment: Pneumocystis prophylaxis during therapy; influenza vaccine for patient and household; no live vaccines while on chemotherapy; revaccination after HCT per transplant protocols.
  • MRD in follow-up: a single positive MRD result does not by itself mean relapse (levels fluctuate), but persistent or rising MRD should trigger a donor search and closer monitoring.

Share with patients: life during and after treatment

Plain-language myth pages written for patients and families. Send them from the clinic to reinforce what you discussed.

09 Landmark trials
012243648600%25%50%75%100%Months from randomisationNew treatmentControl1MedianThe time at which half thepatients have had the event. Amedian gain of a few months canhide a long tail of survivors.2Hazard ratioRelative risk of the event at anymoment (0.70 = 30% lower risk). Itis not an absolute difference.3Absolute differenceThe vertical gap at a fixed time(here about 20 points at 4 years).NNT = 100 ÷ gap.4The tailA plateau suggests some patientsgain long-term control: thetypical immunotherapy pattern.5Crossover and PFSIf control patients get the newdrug later, overall survivaldifferences shrink; a PFS gainalone may not mean longer life.1342
Figure 19. How to read a survival curve (illustrative). Use the absolute gap at a fixed time and overall survival, not the median or PFS alone, when weighing benefit against toxicity and cost.
The trials behind today's choicesE1910 · MRD-negative CR, 30–70 yearsChemo + blinatumomab vs chemo · 3-year OS (%)8568GRAALL-2005/R · CD20+ B-ALLRituximab vs none · 4-year EFS (%)5543COG AALL0434 · T-ALL, 1–31 yearsNelarabine vs none · 5-year DFS (%)8882GRAAPH-2005 · Ph+ ALLLow- vs high-intensity chemo + imatinib · CR (%)9891PhALLCON · Ph+ ALLPonatinib vs imatinib · MRD-negative CR (%)3417TOWER · relapsed B-ALLBlinatumomab vs chemo · median OS (months)7.74.0INO-VATE · relapsed B-ALLInotuzumab vs chemo · CR (%)8129Grey = comparator. Endpoints differ (months or %): compare within a trial, not across trials.
Figure 20. Landmark results as reported in the UpToDate induction, post-remission, Ph-positive, relapsed and childhood treatment reviews.
ALL in India: what published series showAYA 15–29 y, multicentre INwARD (n=572): 2-year OS73%AYA 15–25 y, Tata Memorial (n=349): 3-year OS61%T-ALL, CMC Vellore low-cost protocol (n=113): 5-year OS51%Ph+, multicentre INwARD (n=158): 2-year OS67%Ph+, Tata Memorial 2009–12 (n=65): 2-year OS29%Common threads: many young patients, multidrug-resistant infections during intensive therapy, limited transplant access, costlimiting rituximab, pegylated asparaginase and new antibodies, and 11–15% abandonment. At KGMU Lucknow, 10.6% of 75 AYA patientson BFM-95 did not complete induction (Shukla 2025).
Figure 21. Indian data (Ganesan 2021, Table 2, citing INwARD [Ganesan 2021], Rajendra 2021, Abraham 2014 and others; Shukla 2025). Different eras, ages and protocols: not comparable with each other.
  • CALGB 10403 showed that young adults can safely receive a paediatric regimen delivered by adult oncologists (Stock 2019[12]).
  • E1910 moved blinatumomab into first-line consolidation for MRD-negative adults (Litzow 2024[1]).
  • GRAALL-2005/R established rituximab for CD20+ B-ALL (Maury 2016[16]).
  • GRAAPH-2005 and D-ALBA showed that Ph+ ALL needs a TKI more than intensive chemotherapy (Chalandon 2015[3]; Foà 2020[4]); PhALLCON showed deeper responses with ponatinib (Jabbour 2024[29]).
  • TOWER and INO-VATE made antibodies the standard first salvage for B-ALL (Kantarjian 2017[32]; Kantarjian 2016[33]).
  • MRD: across 39 studies, MRD negativity predicted better survival in adults and children alike (hazard ratio 0.28; Berry 2017[47]); in GMALL 07/2003, 5-year survival was 80% with MRD negativity by week 16 vs 42% without (Gökbuget 2012[48]).
  • Indian evidence: multicentre INwARD AYA data (INwARD[49]), Tata Memorial AYA on modified BFM-90 (Rajendra 2021[50]) and KGMU Lucknow on BFM-95, where 10.6% of 75 patients did not complete induction (Shukla 2025[51]).
10 Practice pearls & pitfalls
  • Send BCR::ABL1 on day 1: the result changes induction within days.
  • Never sedate or lay flat a patient with a big mediastinal mass before the airway and SVC have been assessed.
  • ALL is never low risk for tumour lysis; WBC ≥100,000/µL or LDH ≥2× normal makes it high risk.
  • Keep the first diagnostic sample: PCR-based MRD needs the leukaemia's own fingerprint.
  • "MRD-negative" needs a number: ask the laboratory for the sensitivity (≤10⁻⁴) and send the first pull of the aspirate.
  • Asparaginase activity, not just dose: silent inactivation is common; check levels where possible.
  • Azoles and vincristine do not mix well; plan antifungal cover around vincristine doses.
  • Before high-dose methotrexate: stop proton-pump inhibitors, NSAIDs and other interacting drugs, and drain effusions.
  • Inotuzumab just before transplant raises liver VOD risk: plan the sequence with the transplant team.
  • Re-check CD19, CD22 and CD20 at relapse: antigen-negative relapses follow antibody and CAR-T therapy.
  • Maintenance is long and at home: adherence, social support and a written plan matter as much as the drugs.
11 Case vignettes: lines of management

Nine cases from the clinic.

Case 1T-ALL · mediastinal mass · tumour lysis

Breathless when lying flat

19 years, manWBC 142,000/µLAnterior mediastinal mass

A 19-year-old college student from Nellore has had 3 weeks of cough and 4 days of breathlessness lying flat, with a puffy face. Chest X-ray shows a wide mediastinum; CT shows a 10 cm anterior mass with a pleural effusion and a narrowed trachea. WBC 142,000/µL with blasts; LDH 4× normal; potassium and urate high.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Protect the airway
    No sedation or lying flat; ICU review. The diagnosis can come from blood flow cytometry (and pleural fluid) without a mediastinal biopsy.
  2. Diagnose
    Blasts TdT+, cytoplasmic CD3+, CD7+, CD1a+: T-ALL. BCR::ABL1 negative. Lumbar puncture later, when blasts have cleared from the blood.
  3. Tumour lysis
    High risk (WBC ≥100,000 and LDH ≥2×): IV fluids and rasburicase after a G6PD check; close electrolyte monitoring; steroid prephase begins debulking.
  4. Treat
    Paediatric-inspired asparaginase-rich regimen with CNS prophylaxis; MRD at count recovery; T-ALL MRD in blood and marrow agree, but follow the protocol.

Teaching points

  • Mediastinal mass: the airway comes before the biopsy.
  • ALL with a very high count is high risk for tumour lysis.
  • In adults nelarabine has not improved first-line outcomes; in young adults the COG data are the reference.

See: Sections 02, 03 and 06, Algorithm 1.

Case 2B-ALL · AYA · standard risk

A young mother with fever and pallor

26 years, womanWBC 18,000/µLCD20 positive

A 26-year-old woman from Kavali has had fever and weakness for 6 weeks. Haemoglobin 6.2 g/dL, platelets 34,000/µL, WBC 18,000/µL with 60% blasts. Marrow: B-ALL, CD19+, CD10+, CD20 on 40% of blasts; normal karyotype; BCR::ABL1 negative; spinal fluid CNS-1.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Classify
    Ph-negative B-ALL, standard risk (age <60, WBC <30,000, no adverse genetics). Ph-like screen if available.
  2. Induction
    Paediatric-inspired asparaginase-rich regimen plus rituximab (CD20+); CNS prophylaxis; watch liver, pancreas and clotting with asparaginase.
  3. After remission
    CR with MRD negative at 10⁻⁴: consolidation chemotherapy with blinatumomab, then maintenance for 2–3 years.
  4. Keep her on track
    Social worker and family meeting at the start: abandonment and interruptions are common in India and lower relapse-free survival.

Teaching points

  • Rituximab for CD20+ B-ALL under 65 improves EFS.
  • Blinatumomab in consolidation raised 3-year survival from 68% to 85% (E1910).
  • Adherence is part of the treatment.

See: Sections 06 and 08, Algorithms 2 and 3.

Case 3B-ALL · MRD-positive · transplant

In remission, but not deep enough

33 years, manMRD 0.2%Sibling donor

A 33-year-old teacher with B-ALL (WBC 52,000/µL at diagnosis) is in morphological CR after induction, but flow MRD is 2 × 10⁻³. His younger sister is an HLA match.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Risk
    High risk on two counts: WBC >30,000 and MRD ≥10⁻⁴.
  2. Clear the MRD
    One or two cycles of blinatumomab (in hospital at the start; watch CRS and neurotoxicity). About three-quarters become MRD-negative.
  3. Consolidate with transplant
    Allogeneic HCT from his sister; GRAALL data show benefit from HCT when MRD is ≥10⁻³.
  4. If MRD persists
    More blinatumomab is unlikely to help; consider inotuzumab or a trial, and plan transplant timing to limit VOD risk.

Teaching points

  • MRD after induction is the strongest single predictor in adult ALL.
  • Blinatumomab is the bridge from MRD-positive to transplant.
  • Use an assay that reaches 10⁻⁴.

See: Sections 04 and 06, Algorithm 3.

Case 4Ph+ ALL · TKI · transplant

The fusion that changes everything

52 years, womanBCR::ABL1 p190Diabetic

A 52-year-old woman from Gudur with diabetes presents with tiredness and bruising: WBC 64,000/µL, platelets 22,000/µL. Flow shows B-ALL; RT-PCR on day 2 shows BCR::ABL1 (p190). Echo normal; no effusion or bleeding history.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Start the TKI
    Dasatinib at once (generic available; no effusion or bleeding history); baseline BCR::ABL1 qPCR.
  2. Partner gently
    A steroid alone or vincristine–steroid, not hyper-CVAD: fewer early deaths with equal survival (GRAAPH-2005). Control glucose closely on steroids.
  3. Monitor
    BCR::ABL1 qPCR after 1–2 consolidations: falling. Her brother is a match → allogeneic HCT (reduced intensity considered for age and diabetes).
  4. After transplant
    Restart the TKI when counts recover and continue ≥1 year; repeat MRD. Rising MRD → kinase-domain mutation testing (T315I → ponatinib, if obtainable).

Teaching points

  • Ph+ ALL needs a TKI more than intensive chemotherapy.
  • BCR::ABL1 qPCR is the MRD test.
  • Check ponatinib access early in India.

See: Section 06, Algorithm 4.

Case 5Older adult · inotuzumab · VOD

Seventy, and keen to be treated

68 years, manPh-negative B-ALLIschaemic heart disease

A 68-year-old retired clerk with treated ischaemic heart disease has B-ALL, CD22 on 95% of blasts, BCR::ABL1 negative, performance status 1. He wants treatment that keeps him at home as much as possible.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Goals
    Honest talk: cure is possible but less likely than in younger adults; intensive regimens carry high treatment mortality at his age.
  2. Choose
    Inotuzumab-based moderate-intensity treatment (with dexamethasone, or with mini-hyper-CVD), avoiding an anthracycline-heavy regimen.
  3. Watch
    Weight, abdominal girth and bilirubin for liver VOD (EBMT criteria); infections; prolonged low platelets.
  4. If frail later
    Vincristine–steroid or POMP maintenance for disease control; palliative care alongside.

Teaching points

  • Inotuzumab is not for T-ALL (no CD22).
  • Older adults need gentler, antibody-based regimens.
  • Talk about goals before choosing intensity.

See: Section 06 (older or unfit), Algorithm 2.

Case 6Asparaginase · cerebral sinus thrombosis

Headache and a seizure on day 20

22 years, manOn pegylated asparaginasePlatelets 60,000/µL

A 22-year-old on induction with pegylated asparaginase develops a severe headache and a generalised seizure on day 20. Platelets 60,000/µL; fibrinogen 90 mg/dL; antithrombin 45%.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Image
    Urgent brain imaging: superior sagittal sinus thrombosis. Differentials: bleeding, methotrexate encephalopathy, asparaginase encephalopathy.
  2. Anticoagulate
    LMW heparin with anti-Xa monitoring (antithrombin is low); antithrombin replacement for this high-risk clot; support fibrinogen and platelets to allow anticoagulation.
  3. Asparaginase
    Hold it; after stabilisation (about 4 weeks) decide with a thrombosis expert whether to resume, because asparaginase intensity matters for cure.
  4. Duration
    Anticoagulation for at least 6 months.

Teaching points

  • Asparaginase lowers antithrombin and fibrinogen: clots and bleeds together.
  • Cerebral sinus thrombosis typically appears after several weeks.
  • Thrombosis affects about 14% of adults on asparaginase.

See: Section 06 (toxicity), Algorithm 6.

Case 7High-dose methotrexate · delayed clearance

The level that would not fall

35 years, womanConsolidationCreatinine doubled

A 35-year-old in consolidation receives high-dose methotrexate. At 42 hours her creatinine has doubled and the methotrexate level is far above the expected curve. She has a small pleural effusion and has been taking a proton-pump inhibitor and ciprofloxacin.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Stop the culprits
    Stop the proton-pump inhibitor and ciprofloxacin; avoid NSAIDs.
  2. Support clearance
    Increase IV fluids and urinary alkalinisation (urine pH ≥7) while urine output allows; increase leucovorin according to the measured levels.
  3. Glucarpidase
    Levels stay high with kidney injury → glucarpidase, ideally within 48–60 hours of the start of the infusion; dialysis is only a temporary bridge.
  4. Next cycle
    Drain the effusion and review drugs before the next dose.

Teaching points

  • Methotrexate is cleared by the kidney: acid urine and dehydration cause delay.
  • Effusions are a reservoir.
  • Glucarpidase works best early.

See: Section 06 (toxicity), Algorithm 6.

Case 8Relapsed B-ALL · antibodies · CAR-T

Back after 14 months

30 years, manCD19+, CD22+On maintenance

A 30-year-old man treated for Ph-negative B-ALL relapses in the marrow 14 months after diagnosis, while on maintenance. Blasts CD19+ and CD22+; spinal fluid clear; testes normal. He has a matched sibling.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Re-evaluate
    Marrow flow for CD19, CD22 and CD20; cytogenetics (KMT2A?); lumbar puncture; donor work-up now.
  2. Re-induce
    Blinatumomab (survival advantage over chemotherapy in TOWER) or inotuzumab (higher CR rate in INO-VATE); because HCT is planned, blinatumomab avoids the VOD risk of inotuzumab before transplant.
  3. Consolidate
    MRD-negative second remission → allogeneic HCT from his sibling; CNS prophylaxis continues.
  4. If it fails
    CD19 CAR-T: in India NexCAR19 is approved for relapsed B-cell leukaemia; check eligibility and cost.

Teaching points

  • Early relapse needs transplant for cure.
  • Choose the antibody with the transplant in mind.
  • Antigen loss can follow antibody or CAR-T therapy: re-test at each relapse.

See: Section 06 (relapse), Algorithm 5.

Case 9T-lymphoblastic lymphoma

A mass, but a "normal" marrow

21 years, manMarrow blasts 8%Stage IV

A 21-year-old has neck nodes and a large anterior mediastinal mass. Node core biopsy: TdT+, CD3+, CD7+, CD1a+ lymphoblasts. Marrow shows 8% lymphoblasts; spinal fluid CNS-1; LDH twice normal.

Before you open the answer: what is the likely diagnosis, what must be done before treatment, and what is the plan?

Show the line of management
  1. Name it
    Mass with <20% marrow blasts = T-lymphoblastic lymphoma: the same disease as T-ALL.
  2. Treat
    An ALL protocol of T lineage with full CNS prophylaxis, tumour-lysis prevention and airway care; not a CHOP-type lymphoma regimen.
  3. Follow
    Marrow and blood MRD as per protocol; about 60% of T-LBL later become leukaemic without effective therapy.
  4. Open question
    Residual mediastinal mass at the end of treatment: the supplied sources do not settle the role of RT; decide with the protocol and tumour board.

Teaching points

  • LBL is treated as ALL.
  • Thymoma is the key mimic: keratin and polyclonal thymocytes.
  • CNS involvement is frequent: always do the lumbar puncture.

See: Sections 03, 05 and 06.

12 References & guidelines
  • European LeukemiaNet 2024 recommendations for ALL in adults; NCCN Guidelines: Acute Lymphoblastic Leukemia (current version); ASH 2026 guideline for ALL in adolescents and young adults; WHO Classification 5th edition and International Consensus Classification (2022); ISTH guidance on asparaginase-related thrombosis; EBMT criteria for hepatic SOS/VOD.
  • Cross-checked in October 2026 against 20 UpToDate topic reviews: clinical manifestations, pathologic features and diagnosis of B cell ALL/LBL; of precursor T cell ALL/LBL; classification, cytogenetics and molecular genetics of ALL/LBL; detection of measurable residual disease in ALL/LBL; clinical use of MRD detection in ALL; induction therapy for Ph-negative ALL in adults; Ph-negative ALL in adults: post-remission management; induction therapy for Ph-positive ALL in adults; Ph-positive ALL in adults: post-remission management; treatment of relapsed or refractory ALL in adults; tumor lysis syndrome: prevention and treatment; hepatic sinusoidal obstruction syndrome (veno-occlusive disease) in adults; antithrombin deficiency (section on asparaginase); overview of neurologic complications of conventional non-platinum cancer chemotherapy; therapeutic use and toxicity of high-dose methotrexate; and, for contrast only, the overview of presentation and diagnosis of ALL/LBL in children, prognostic factors and risk groups, treatment, relapsed or refractory disease, and outcomes and late effects in children and adolescents. All trial citations below come from the reference lists of these reviews, except the JIPMER review and the KGMU Lucknow series (found and verified by web search on 17 October 2026), the three Indian series cited from the JIPMER review's reference list, and the NexCAR19 trial (verified 16 October 2026).
  • Reviewed and approved by Dr. Haritha Chiramana, 17 October 2026.

Core trials and papers cited on this page (54)

Journal, year, volume and first page (or DOI); each links to PubMed.

Numbered in order of first citation in the text

  1. E1910 (Litzow 2024): Litzow MR, Sun Z, Mattison RJ, et al. Blinatumomab for MRD-negative acute lymphoblastic leukemia in adults. N Engl J Med 2024;391:320. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  2. BLAST, blinatumomab for MRD (Gökbuget 2018): Gökbuget N, Dombret H, Bonifacio M, et al. Blinatumomab for minimal residual disease in adults with B-cell precursor acute lymphoblastic leukemia. Blood 2018;131:1522. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  3. GRAAPH-2005 (Chalandon 2015): Chalandon Y, Thomas X, Hayette S, et al. Randomized study of reduced-intensity chemotherapy combined with imatinib in adults with Ph-positive acute lymphoblastic leukemia. Blood 2015;125:3711. PubMed Ph-positive ALL
  4. GIMEMA D-ALBA (Foà 2020): Foà R, Bassan R, Vitale A, et al. Dasatinib-blinatumomab for Ph-positive acute lymphoblastic leukemia in adults. N Engl J Med 2020;383:1613. PubMed Ph-positive ALL
  5. Adult ALL in India: how we treat (Ganesan 2021): Ganesan P, Kayal S. How I treat adult acute lymphoblastic leukemia in India. Ind J Med Paediatr Oncol 42:584 (JIPMER, Puducherry). 2021. doi:10.1055/s-0041-1731979. PubMed India
  6. Ph-like ALL in adults (Roberts 2017): Roberts KG, Gu Z, Payne-Turner D, et al. High frequency and poor outcome of Philadelphia chromosome-like acute lymphoblastic leukemia in adults. J Clin Oncol 2017;35:394. PubMed Diagnosis, genetics, risk and MRD
  7. Oncogenetic risk in adult T-ALL (Trinquand 2013): Trinquand A, Tanguy-Schmidt A, Ben Abdelali R, et al. Toward a NOTCH1/FBXW7/RAS/PTEN-based oncogenetic risk classification of adult T-cell acute lymphoblastic leukemia: a GRAALL study. J Clin Oncol 2013;31:4333. PubMed Diagnosis, genetics, risk and MRD
  8. ETP-ALL in adults (Jain 2016): Jain N, Lamb AV, O'Brien S, et al. Early T-cell precursor acute lymphoblastic leukemia/lymphoma (ETP-ALL/LBL) in adolescents and adults: a high-risk subtype. Blood 2016;127:1863. PubMed Diagnosis, genetics, risk and MRD
  9. T-ALL in UKALL XII/ECOG 2993 (Marks 2009): Marks DI, Paietta EM, Moorman AV, et al. T-cell acute lymphoblastic leukemia in adults: clinical features, immunophenotype, cytogenetics, and outcome from UKALL XII/ECOG 2993. Blood 2009;114:5136. PubMed Diagnosis, genetics, risk and MRD
  10. CPIC thiopurine guideline (Relling 2019): Relling MV, Schwab M, Whirl-Carrillo M, et al. Clinical Pharmacogenetics Implementation Consortium guideline for thiopurine dosing based on TPMT and NUDT15 genotypes: 2018 update. Clin Pharmacol Ther 2019;105:1095. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  11. Asparaginase thrombosis in practice (Mort 2025): Mort JF, Brighton D, Mautner B, et al. Real-world analysis of strategies to prevent thrombosis and bleeding in adults with ALL treated with asparaginase. Blood Vessel Thromb Hemost 2:100065. 2025. PubMed Supportive care and toxicity
  12. CALGB 10403 (Stock 2019): Stock W, Luger SM, Advani AS, et al. A pediatric regimen for older adolescents and young adults with acute lymphoblastic leukemia: results of CALGB 10403. Blood 2019;133:1548. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  13. DFCI adult ALL (DeAngelo 2015): DeAngelo DJ, Stevenson KE, Dahlberg SE, et al. Long-term outcome of a pediatric-inspired regimen used for adults aged 18-50 years with newly diagnosed acute lymphoblastic leukemia. Leukemia 2015;29:526. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  14. GRAALL-2005 (Huguet 2018): Huguet F, Chevret S, Leguay T, et al. Intensified therapy of acute lymphoblastic leukemia in adults: report of the randomized GRAALL-2005 clinical trial. J Clin Oncol 2018;36:2514. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  15. Hyper-CVAD with rituximab (Thomas 2010): Thomas DA, O'Brien S, Faderl S, et al. Chemoimmunotherapy with a modified hyper-CVAD and rituximab regimen improves outcome in de novo Philadelphia chromosome-negative precursor B-lineage acute lymphoblastic leukemia. J Clin Oncol 2010;28:3880. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  16. GRAALL-2005/R rituximab (Maury 2016): Maury S, Chevret S, Thomas X, et al. Rituximab in B-lineage adult acute lymphoblastic leukemia. N Engl J Med 2016;375:1044. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  17. UKALL14 rituximab (Marks 2022): Marks DI, Kirkwood AA, Rowntree CJ, et al. Addition of four doses of rituximab to standard induction chemotherapy in adult patients with precursor B-cell acute lymphoblastic leukaemia (UKALL14). Lancet Haematol 2022;9:e262. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  18. GRAALL transplant by MRD (Dhédin 2015): Dhédin N, Huynh A, Maury S, et al. Role of allogeneic stem cell transplantation in adult patients with Ph-negative acute lymphoblastic leukemia. Blood 2015;125:2486. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  19. UKALL XII/ECOG E2993 transplant (Goldstone 2008): Goldstone AH, Richards SM, Lazarus HM, et al. In adults with standard-risk ALL, the greatest benefit is achieved from a matched sibling allogeneic transplantation in first complete remission: final results of the International ALL Trial (MRC UKALL XII/ECOG E2993). Blood 2008;111:1827. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  20. Allogeneic HCT in first CR, IPD meta-analysis (Gupta 2013): Gupta V, Richards S, Rowe J. Allogeneic, but not autologous, hematopoietic cell transplantation improves survival only among younger adults with acute lymphoblastic leukemia in first remission: an individual patient data meta-analysis. Blood 2013;121:339. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  21. Paediatric-inspired therapy vs allograft (Seftel 2016): Seftel MD, Neuberg D, Zhang MJ, et al. Pediatric-inspired therapy compared to allografting for Philadelphia chromosome-negative adult ALL in first complete remission. Am J Hematol 2016;91:322. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  22. Inotuzumab-dexamethasone in older adults (Stelljes 2024): Stelljes M, Raffel S, Alakel N, et al. Inotuzumab ozogamicin as induction therapy for patients older than 55 years with Philadelphia chromosome-negative B-precursor ALL. J Clin Oncol 2024;42:273. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  23. Inotuzumab with mini-hyper-CVD (Kantarjian 2018): Kantarjian H, Ravandi F, Short NJ, et al. Inotuzumab ozogamicin in combination with low-intensity chemotherapy for older patients with Philadelphia chromosome-negative acute lymphoblastic leukaemia: a single-arm, phase 2 study. Lancet Oncol 2018;19:240. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  24. Venetoclax with mini-hyper-CVD (Luskin 2025): Luskin MR, Shimony S, Keating J, et al. Venetoclax plus low-intensity chemotherapy for adults with acute lymphoblastic leukemia. Blood Adv 2025;9:617. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  25. COG AALL0434 nelarabine (Dunsmore 2020): Dunsmore KP, Winter SS, Devidas M, et al. Children's Oncology Group AALL0434: a phase III randomized clinical trial testing nelarabine in newly diagnosed T-cell acute lymphoblastic leukemia. J Clin Oncol 2020;38:3282. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  26. Low-cost T-ALL protocol, Vellore (Abraham 2014): Abraham A, George B, Ahmed R, et al. Outcome of treatment with a low cost protocol in adults with T cell acute lymphoblastic leukemia in a tertiary care center in India. Leuk Lymphoma 2014;55:947. PubMed India
  27. EWALL-PH-01 (Rousselot 2016): Rousselot P, Coudé MM, Gokbuget N, et al. Dasatinib and low-intensity chemotherapy in elderly patients with Philadelphia chromosome-positive ALL. Blood 2016;128:774. PubMed Ph-positive ALL
  28. GIMEMA LAL1205 (Foà 2011): Foà R, Vitale A, Vignetti M, et al. Dasatinib as first-line treatment for adult patients with Philadelphia chromosome-positive acute lymphoblastic leukemia. Blood 2011;118:6521. PubMed Ph-positive ALL
  29. PhALLCON (Jabbour 2024): Jabbour E, Kantarjian HM, Aldoss I, et al. Ponatinib vs imatinib in frontline Philadelphia chromosome-positive acute lymphoblastic leukemia: a randomized clinical trial. JAMA 2024;331:1814. PubMed Ph-positive ALL
  30. Ponatinib with hyper-CVAD (Jabbour 2018): Jabbour E, Short NJ, Ravandi F, et al. Combination of hyper-CVAD with ponatinib as first-line therapy for Philadelphia chromosome-positive acute lymphoblastic leukaemia: long-term follow-up of a single-centre, phase 2 study. Lancet Haematol 2018;5:e618. PubMed Ph-positive ALL
  31. Transplant in MRD-negative Ph+ ALL (Ghobadi 2022): Ghobadi A, Slade M, Kantarjian H, et al. The role of allogeneic transplant for adult Ph+ ALL in CR1 with complete molecular remission: a retrospective analysis. Blood 2022;140:2101. PubMed Ph-positive ALL
  32. TOWER (Kantarjian 2017): Kantarjian H, Stein A, Gökbuget N, et al. Blinatumomab versus chemotherapy for advanced acute lymphoblastic leukemia. N Engl J Med 2017;376:836. PubMed Relapsed and refractory ALL
  33. INO-VATE (Kantarjian 2016): Kantarjian HM, DeAngelo DJ, Stelljes M, et al. Inotuzumab ozogamicin versus standard therapy for acute lymphoblastic leukemia. N Engl J Med 2016;375:740. PubMed Relapsed and refractory ALL
  34. ELIANA (Maude 2018): Maude SL, Laetsch TW, Buechner J, et al. Tisagenlecleucel in children and young adults with B-cell lymphoblastic leukemia. N Engl J Med 2018;378:439. PubMed Relapsed and refractory ALL
  35. ZUMA-3 (Shah 2021): Shah BD, Ghobadi A, Oluwole OO, et al. KTE-X19 for relapsed or refractory adult B-cell acute lymphoblastic leukaemia: phase 2 results of the ZUMA-3 study. Lancet 2021;398:491. PubMed Relapsed and refractory ALL
  36. FELIX (Roddie 2024): Roddie C, Sandhu KS, Tholouli E, et al. Obecabtagene autoleucel in adults with B-cell acute lymphoblastic leukemia. N Engl J Med 2024;391:2219. PubMed Relapsed and refractory ALL
  37. NexCAR19 pivotal trial (India): Jain H, Karulkar A, Kalra D, et al. Talicabtagene autoleucel (NexCAR19) for relapsed or refractory B-cell malignancies: results from an open-label, multicentre, phase 1/2 study. Lancet Haematol 2025;12:e282. PubMed India
  38. AUGMENT-101 (Issa 2025): Issa GC, Aldoss I, Thirman MJ, et al. Menin inhibition with revumenib for KMT2A-rearranged relapsed or refractory acute leukemia (AUGMENT-101). J Clin Oncol 2025;43:75. PubMed Relapsed and refractory ALL
  39. Nelarabine salvage in adults (Candoni 2020): Candoni A, Lazzarotto D, Ferrara F, et al. Nelarabine as salvage therapy and bridge to allogeneic stem cell transplant in 118 adult patients with relapsed/refractory T-cell acute lymphoblastic leukemia/lymphoma: a CAMPUS ALL study. Am J Hematol 2020;95:1466. PubMed Relapsed and refractory ALL
  40. TLS consensus guidelines (Perissinotti 2023): Perissinotti AJ, Bishop MR, Bubalo J, et al. Expert consensus guidelines for the prophylaxis and management of tumor lysis syndrome in the United States: results of a modified Delphi panel. Cancer Treat Rev 2023;120:102603. PubMed Supportive care and toxicity
  41. Tumour lysis guidelines (Coiffier 2008): Coiffier B, Altman A, Pui CH, et al. Guidelines for the management of pediatric and adult tumor lysis syndrome: an evidence-based review. J Clin Oncol 2008;26:2767. PubMed Supportive care and toxicity
  42. Asparagine depletion, CALGB 9511 (Wetzler 2007): Wetzler M, Sanford BL, Kurtzberg J, et al. Effective asparagine depletion with pegylated asparaginase results in improved outcomes in adult acute lymphoblastic leukemia: CALGB 9511. Blood 2007;109:4164. PubMed Ph-negative ALL: induction, post-remission therapy and transplant
  43. ISTH asparaginase VTE guidance (Zwicker 2020): Zwicker JI, Wang TF, DeAngelo DJ, et al. The prevention and management of asparaginase-related venous thromboembolism in adults: guidance from the SSC on Hemostasis and Malignancy of the ISTH. J Thromb Haemost 2020;18:278. PubMed Supportive care and toxicity
  44. LMWH prophylaxis with asparaginase (Sibai 2020): Sibai H, Chen R, Liu X, et al. Anticoagulation prophylaxis reduces venous thromboembolism rate in adult acute lymphoblastic leukaemia treated with asparaginase-based therapy. Br J Haematol 2020;191:748. PubMed Supportive care and toxicity
  45. Glucarpidase consensus (Ramsey 2018): Ramsey LB, Balis FM, O'Brien MM, et al. Consensus guideline for use of glucarpidase in patients with high-dose methotrexate induced acute kidney injury and delayed methotrexate clearance. Oncologist 2018;23:52. PubMed Supportive care and toxicity
  46. EBMT SOS criteria (Mohty 2016): Mohty M, Malard F, Abecassis M, et al. Revised diagnosis and severity criteria for sinusoidal obstruction syndrome/veno-occlusive disease in adult patients: a new classification from the EBMT. Bone Marrow Transplant 2016;51:906. PubMed Supportive care and toxicity
  47. MRD meta-analysis in ALL (Berry 2017): Berry DA, Zhou S, Higley H, et al. Association of minimal residual disease with clinical outcome in pediatric and adult acute lymphoblastic leukemia: a meta-analysis. JAMA Oncol 2017;3:e170580. PubMed Diagnosis, genetics, risk and MRD
  48. GMALL 07/2003 MRD (Gökbuget 2012): Gökbuget N, Kneba M, Raff T, et al. Adult patients with acute lymphoblastic leukemia and molecular failure display a poor prognosis and are candidates for stem cell transplantation and targeted therapies. Blood 2012;120:1868. PubMed Diagnosis, genetics, risk and MRD
  49. INwARD AYA ALL registry (Ganesan 2021): Ganesan P, Jain H, Bagal B, et al. Outcomes in adolescent and young adult acute lymphoblastic leukaemia: a report from the Indian Acute Leukaemia Research Database (INwARD) of the Hematology Cancer Consortium. Br J Haematol 2021;193:e1. PubMed India
  50. AYA ALL at Tata Memorial (Rajendra 2021): Rajendra A, Jain H, Bonda VNA, et al. Outcomes and prognostic factors in adolescents and young adults with ALL treated with a modified BFM-90 protocol. Blood Adv 2021;5:1178. PubMed India
  51. AYA ALL in North India (Shukla 2025): Shukla A, Verma SP, Tripathi AK, Sinha S. Treatment outcome in adolescent and young adult acute lymphoblastic leukaemia on BFM-95 protocol: experience of a tertiary care institute from North India. ecancermedicalscience 19:1962. 2025. doi:10.3332/ecancer.2025.1962. PubMed India

Further reading (not cited in the text above)

  • ELN 2024 adult ALL (Gökbuget 2024): Gökbuget N, Boissel N, Chiaretti S, et al. Management of ALL in adults: 2024 ELN recommendations from a European expert panel. Blood 2024;143:1903. PubMed Diagnosis, genetics, risk and MRD
  • Standard-risk MRD, GMALL (Brüggemann 2006): Brüggemann M, Raff T, Flohr T, et al. Clinical significance of minimal residual disease quantification in adult patients with standard-risk acute lymphoblastic leukemia. Blood 2006;107:1116. PubMed Diagnosis, genetics, risk and MRD
  • ASH AYA ALL guideline (DuVall 2026): DuVall AS, McNeer J, Cheung MC, et al. American Society of Hematology 2026 guidelines for frontline management of acute lymphoblastic leukemia in adolescents and young adults. Blood Adv 2026;10:4671. PubMed Ph-negative ALL: induction, post-remission therapy and transplant

How to cite this page

VancouverChiramana H. Acute Lymphoblastic Leukaemia: a mini review for clinicians. Oncology Knowledge Hub [Internet]. Nellore (India): drharitha.co.in; 2026 [updated 2026 Oct 17; cited year month day]. Available from: https://drharitha.co.in/professionals/acute-lymphoblastic-leukaemia

APA 7Chiramana, H. (2026, October 17). Acute Lymphoblastic Leukaemia: A mini review for clinicians. Oncology Knowledge Hub. Retrieved Month Day, Year, from https://drharitha.co.in/professionals/acute-lymphoblastic-leukaemia

Free to use and share for education with attribution; please do not alter or use commercially (CC BY-NC-ND 4.0). Replace the italic parts with the date you accessed the page.

Educational summary for health professionals, written in our own words from current guidelines and primary trials. No drug doses are given. Hodgkin, aggressive B-cell, indolent B-cell, T-cell and cutaneous lymphomas are parts 1–5, multiple myeloma is part 6 and acute myeloid leukaemia is part 7; chronic myeloid leukaemia is part 9; CLL is covered in the indolent B-cell module; childhood ALL appears here only as a contrast. Verify current guidelines, Indian regulatory approvals and individual patient factors before treatment decisions.

Dr. Haritha Chiramana
Written by Dr. Haritha ChiramanaSenior Medical Oncologist & Hemato-Oncologist · MD, DM (Medical Oncology) · C.R. Reddy Cancer Center, Nellore, Andhra Pradesh, India

Medically reviewed by Dr. Haritha Chiramana on 17 October 2026. This page is general education and cannot replace an individual consultation.