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Myth Busters · Lung cancer

Lung cancer myths,
answered with evidence.

ఊపిరితిత్తుల క్యాన్సర్ – అపోహలు, నిజాలు

Lung cancer is not only a smoker's disease, and it is often mistaken for TB or a lingering infection. This series answers the myths about causes, symptoms, tests, staging and treatment, so people know when to get checked and what to ask.

When to see a doctor

Signs you should get checked

  • A cough that has lasted more than 3 weeks
  • Breathlessness or wheeze on walking
  • Blood in the sputum
  • A sore in the mouth that does not heal

Read more: Bidis are safer than cigarettes because they are small and natural?

Sudden or severe symptoms need emergency care: go to the nearest emergency department or call 108.

34 myths · Updated October 2026

Causes & risk

Causes and risk

Myth #01 · Causes & risk

Only smokers get lung cancer?

సిగరెట్ తాగేవాళ్లకు మాత్రమే ఊపిరితిత్తుల క్యాన్సర్ వస్తుందా?

Lung cancer also occurs in people who have never smoked. Second-hand smoke, air pollution, cooking smoke, workplace exposures and family history can all play a part.

Read the factsMyth #02 · Causes & risk

Women rarely get lung cancer?

స్త్రీలకు ఊపిరితిత్తుల క్యాన్సర్ అరుదుగా వస్తుందా?

Lung cancer affects both women and men. One type, adenocarcinoma, is an important cancer in women who have never smoked.

Read the factsMyth #03 · Causes & risk

If I stop smoking, my lung cancer risk becomes zero straight away?

పొగ మానేయగానే ఊపిరితిత్తుల క్యాన్సర్ ప్రమాదం వెంటనే సున్నా అవుతుందా?

Quitting lowers your risk steadily over the years, but former smokers can stay at higher risk for a long time.

Read the factsMyth #04 · Causes & risk

Only elderly people get lung cancer?

వయసు మళ్లినవాళ్లకు మాత్రమే ఊపిరితిత్తుల క్యాన్సర్ వస్తుందా?

Lung cancer is more common with age, but younger adults can get it too, including people who have never smoked.

Read the factsMyth #05 · Causes & risk

Air pollution cannot cause lung cancer?

గాలి కాలుష్యం వల్ల ఊపిరితిత్తుల క్యాన్సర్ రాదా?

Outdoor air pollution and smoke from burning fuels at home are established causes of lung cancer.

Read the factsMyth #21 · Causes & risk

Bidis are safer than cigarettes because they are small and natural?

బీడీలు చిన్నవి, సహజమైనవి కాబట్టి సిగరెట్ల కంటే సురక్షితమా?

Bidis are not safer. They deliver as much or more tar, nicotine and carbon monoxide as cigarettes and cause lung, mouth and throat cancers.

Read the factsMyth #22 · Causes & risk

Hookah and e-cigarettes are harmless alternatives to smoking?

హుక్కా, ఈ-సిగరెట్లు పొగ తాగడానికి హాని లేని ప్రత్యామ్నాయాలా?

Neither is harmless. A hookah session delivers large amounts of smoke and toxins, and e-cigarettes contain addictive nicotine and chemicals whose long-term cancer risk is not known.

Read the factsMyth #25 · Causes & risk

Lung cancer can spread to family members who live with the patient?

రోగితో కలిసి ఉండే కుటుంబ సభ్యులకు ఊపిరితిత్తుల క్యాన్సర్ అంటుకుంటుందా?

Lung cancer is not contagious. You cannot catch it by living with, touching, hugging or caring for someone who has it.

Read the facts
Symptoms & early detection

Symptoms and early detection

Myth #06 · Symptoms & early detection

Lung cancer always causes a persistent cough?

ఊపిరితిత్తుల క్యాన్సర్ ఉంటే ఎప్పుడూ తగ్గని దగ్గు ఉంటుందా?

Early lung cancer often causes no symptoms at all, and may be found by chance on a scan done for another reason.

Read the factsMyth #07 · Symptoms & early detection

If there is no blood in the sputum, it can't be lung cancer?

కఫంలో రక్తం లేకపోతే ఊపిరితిత్తుల క్యాన్సర్ కాదా?

Only some people with lung cancer cough up blood. Its absence does not rule cancer out.

Read the factsMyth #08 · Symptoms & early detection

A long-lasting cough is always due to infection, allergy or TB?

చాలా కాలం దగ్గు అంటే ఎప్పుడూ ఇన్‌ఫెక్షన్, అలర్జీ లేదా టీబీయేనా?

Infection, allergy and TB are common causes, but a cough that persists or changes without a clear explanation needs proper evaluation.

Read the factsMyth #09 · Symptoms & early detection

A normal chest X-ray completely rules out lung cancer?

ఛాతీ ఎక్స్‌రే నార్మల్ వస్తే ఊపిరితిత్తుల క్యాన్సర్ పూర్తిగా లేనట్లేనా?

Small tumours, or those hidden behind the heart or other structures, can be missed on an X-ray. A CT scan shows much more detail when it is needed.

Read the factsMyth #10 · Symptoms & early detection

Everyone should have a yearly CT scan to check for lung cancer?

ఊపిరితిత్తుల క్యాన్సర్ కోసం అందరూ ఏటా సీటీ స్కాన్ చేయించుకోవాలా?

Low-dose CT screening is meant for selected people at high risk, not for everyone. Whether you qualify depends on your age, smoking history and the guidelines your doctor follows.

Read the factsMyth #23 · Symptoms & early detection

Blood in the sputum always means TB?

కఫంలో రక్తం అంటే ఎప్పుడూ టీబీయేనా?

TB is one cause, but blood in the sputum can also come from infection, bronchiectasis or lung cancer. It always needs a proper check.

Read the factsMyth #24 · Symptoms & early detection

If I had TB before, my new cough must be TB again?

ఇంతకు ముందు టీబీ వచ్చింది కాబట్టి కొత్త దగ్గు కూడా టీబీయేనా?

Not necessarily. People who have had TB have a higher risk of lung cancer, so new symptoms need fresh tests, not an automatic repeat of TB treatment.

Read the facts
Diagnosis & staging

Diagnosis and staging

Myth #11 · Diagnosis & staging

A lung biopsy makes cancer spread?

ఊపిరితిత్తుల బయాప్సీ వల్ల క్యాన్సర్ వ్యాపిస్తుందా?

Spread of cancer from a properly performed lung biopsy is exceptionally uncommon. A tissue sample is usually essential for the right treatment.

Read the factsMyth #12 · Diagnosis & staging

Every lung nodule seen on a CT scan is cancer?

సీటీ స్కాన్‌లో కనిపించే ప్రతి ఊపిరితిత్తుల నాడ్యూల్ క్యాన్సరేనా?

Most lung nodules are harmless, often scars from old infections such as TB. The risk depends on their size, shape, growth and your own risk factors.

Read the factsMyth #13 · Diagnosis & staging

A PET scan can confirm lung cancer without a biopsy?

బయాప్సీ లేకుండానే పెట్ స్కాన్ ఊపిరితిత్తుల క్యాన్సర్‌ను నిర్ధారించగలదా?

A PET scan can't confirm cancer on its own. TB and other inflammation can also "light up". A tissue sample is usually needed.

Read the factsMyth #14 · Diagnosis & staging

All lung cancers are the same and get the same treatment?

ఊపిరితిత్తుల క్యాన్సర్లన్నీ ఒకటేనా, అందరికీ ఒకే చికిత్సా?

There are different types of lung cancer, and gene changes in the tumour, such as EGFR, ALK and ROS1, can decide which treatment works best.

Read the factsMyth #15 · Diagnosis & staging

If lung cancer has spread to the lymph nodes, it is automatically stage IV?

ఊపిరితిత్తుల క్యాన్సర్ లింఫ్ గ్రంథులకు పాకితే అది ఆటోమేటిక్‌గా నాలుగో దశా?

Spread to nearby lymph nodes usually means stage II or III, which is often still treated with the aim of cure. Stage IV generally means spread to distant parts of the body.

Read the factsMyth #26 · Diagnosis & staging

An EGFR mutation in my lung cancer means my children will get cancer too?

నా ఊపిరితిత్తుల క్యాన్సర్‌లో ఈజీఎఫ్‌ఆర్ మ్యుటేషన్ ఉంటే నా పిల్లలకూ క్యాన్సర్ వస్తుందా?

In almost all cases, the EGFR mutation found in a lung cancer is acquired in the tumour itself. It is not inherited and is not passed to children.

Read the factsMyth #33 · Diagnosis & staging

Every lung nodule must be removed by surgery straight away?

ప్రతి ఊపిరితిత్తుల నాడ్యూల్‌నూ వెంటనే ఆపరేషన్‌తో తీసేయాలా?

Most small lung nodules are not cancer. Many need only follow-up CT scans; only nodules that look suspicious or grow need a biopsy or surgery.

Read the facts
Treatment & survival

Treatment and survival

Myth #16 · Treatment & survival

Surgery is the only way to cure lung cancer?

ఊపిరితిత్తుల క్యాన్సర్ నయం కావాలంటే ఆపరేషన్ ఒక్కటే మార్గమా?

Surgery is important for early lung cancer, but stereotactic radiotherapy (SBRT) can also treat it with the aim of cure, especially for people who can't have an operation.

Read the factsMyth #17 · Treatment & survival

Radiotherapy always destroys the entire lung?

రేడియోథెరపీ ఎప్పుడూ ఊపిరితిత్తి మొత్తాన్ని నాశనం చేస్తుందా?

Modern radiotherapy focuses the dose on the tumour and limits exposure to healthy lung. Side effects are possible, but they are monitored and managed.

Read the factsMyth #18 · Treatment & survival

Every patient with lung cancer must have chemotherapy?

ఊపిరితిత్తుల క్యాన్సర్ ఉన్న ప్రతి రోగికీ కీమోథెరపీ తప్పదా?

Treatment depends on the type, stage and gene changes of the cancer, and on the person's fitness. Some people are treated with surgery, SBRT, targeted tablets or immunotherapy without conventional chemotherapy.

Read the factsMyth #19 · Treatment & survival

Stage IV lung cancer means treatment is useless?

నాలుగో దశ ఊపిరితిత్తుల క్యాన్సర్ అంటే చికిత్స వల్ల ఉపయోగం లేదా?

Stage IV lung cancer is generally not curable, but modern treatments can control it well, sometimes for a long time, and help people live better.

Read the factsMyth #20 · Treatment & survival

Once lung cancer treatment is finished, follow-up scans aren't needed?

ఊపిరితిత్తుల క్యాన్సర్ చికిత్స ముగిశాక తదుపరి స్కాన్లు అవసరం లేదా?

Follow-up is essential to catch any return of the cancer, late side effects of treatment, and new lung cancers early.

Read the factsMyth #27 · Treatment & survival

Tablets for lung cancer are weaker than 'real' chemotherapy?

ఊపిరితిత్తుల క్యాన్సర్‌కు మాత్రలు అసలైన కీమోథెరపీ కంటే బలహీనమైనవా?

For lung cancers with the right gene change, targeted tablets usually work better than chemotherapy and have fewer side effects.

Read the factsMyth #28 · Treatment & survival

Immunotherapy and targeted therapy have no side effects?

ఇమ్యునోథెరపీ, టార్గెటెడ్ చికిత్సలకు దుష్ప్రభావాలు ఉండవా?

These treatments are often easier than chemotherapy, but they do have side effects, some of them serious. Reporting new symptoms early keeps treatment safe.

Read the factsMyth #29 · Treatment & survival

Herbal or traditional medicine can cure lung cancer instead of medical treatment?

వైద్య చికిత్సకు బదులు మూలికా లేదా సంప్రదాయ వైద్యంతో ఊపిరితిత్తుల క్యాన్సర్ నయమవుతుందా?

No herbal or traditional remedy has been shown to cure lung cancer. Choosing it instead of proven treatment can let a curable cancer become incurable.

Read the factsMyth #30 · Treatment & survival

After radiotherapy, the patient is radioactive and should stay away from family?

రేడియోథెరపీ తర్వాత రోగి నుంచి రేడియేషన్ వస్తుంది కాబట్టి కుటుంబానికి దూరంగా ఉండాలా?

Standard external radiotherapy does not make you radioactive. It is completely safe to hug, live with and care for children and family after each session.

Read the factsMyth #31 · Treatment & survival

Older people are too old to be treated for lung cancer?

వయసు మళ్లినవాళ్లకు ఊపిరితిత్తుల క్యాన్సర్ చికిత్స చేయలేమా?

Age alone is not a reason to refuse treatment. Fitness, other illnesses and personal wishes matter far more than the number of years.

Read the factsMyth #32 · Treatment & survival

If a lung cancer patient needs oxygen, nothing more can be done?

ఊపిరితిత్తుల క్యాన్సర్ రోగికి ఆక్సిజన్ అవసరమైతే ఇక ఏమీ చేయలేమా?

Not true. Breathlessness often has treatable causes, such as fluid around the lung or a blocked airway, and some treatments work within days.

Read the factsMyth #34 · Treatment & survival

Once you have lung cancer, there is no point in stopping smoking?

ఊపిరితిత్తుల క్యాన్సర్ వచ్చాక పొగ మానేసి ఏం లాభం?

Stopping smoking after a diagnosis helps treatment work better, reduces side effects and complications, and lowers the risk of a new cancer.

Read the facts
Have a lung cancer myth you'd like Dr. Haritha to answer? Send it on WhatsApp. Educational information is general and cannot replace an individualised clinical consultation.