Lung cancer
Wiki, Facts

 Lung cancer facts

• If left untreated, this growth can spread beyond the lung by the process of metastasis into nearby tissue or other parts of the body
• Most cancers that start in the lung, known as primary lung cancers, are carcinomas
• The two main types are small-cell lung carcinoma (SCLC) and non-small-cell lung carcinoma (NSCLC)
• The most common symptoms are coughing (including coughing up blood), weight loss, shortness of breath, and chest pains
• The vast majority (85%) of cases of lung cancer are due to long-term tobacco smoking
• About 10–15% of cases occur in people who have never smoked
• These cases are often caused by a combination of genetic factors and exposure to radon gas, asbestos, second-hand smoke, or other forms of air pollution
• Lung cancer may be seen on chest radiographs and computed tomography (CT) scans
• The diagnosis is confirmed by biopsy which is usually performed by bronchoscopy or CT-guidance
• Prevention is by avoiding risk factors including smoking and air pollution