Lung cancer, also known as lung carcinoma, is the uncontrolled growth of abnormal cells in one or both lungs. It most often occurs in people who smoke. As lung cancer grows, abnormal cells can form tumours and interfere with the functioning of the lung, which provides oxygen to the body via blood.
Warning Signs
The associated symptoms of lung cancer include:
- Persistent cough
- Blood in sputum (spit or phlegm)
- Shortness of breath—either on exertion or at rest
- Chest pain
- Change in voice
Risk Factor
- Tobacco smoking (causes 60-65 per cent of lung cancers)
- Exposure to second-hand or passive smoking
- Exposure to radon gas, asbestos, and other carcinogens
- Family history of lung cancer
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