Abstract
Abstract: Lung cancer is one of the most leading causes of cancer death in the world. Lung cancer also known as lung carcinoma is a malignant lung tumor characterized by uncontrolled cell growth in tissues of the lung. If left untreated this growth can spread beyond the lung by 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 that derive from epithelial cells. The main primary types are smallcell lung carcinoma (SCLC) and non-small-cell lung carcinoma (NSCLC). The vast majority (85%) of cases of lung cancer are due to long-term exposure to tobacco smoke. 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, or other forms of air pollution, including second-hand smoke. This review gives a detailed idea on the epidemiology, causes, types, signs & symptoms, and treatment of lung cancer.
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