Lung cancer is a medical condition defined by unusual cell development in lung tissues. If the treatment delayed the cell growth can lead to metastasis into adjacent tissues beyond the lung and gradually to the other parts of the body. Most of the lung cancers can be characterized as carcinomas that generates from epithelial cells.
The most common type of lung cancer is small-cell lung cancer or SCLC which is also known as oat cell cancerand the other form of lung cancer is non-small cell lung cancer or NSCLC.
Lung cancer can be detected by chest radiography and CT scan (computed tomography) and the detection can be confirmed through a bronchoscopy biopsy. The prognosis and the treatment rely on the physical history of the patient, his general health and the stage of the cancer.
Symptoms of Lung Cancer:
The most common symptoms of lung cancer are –
- Pain in abdomen
- Chest pain
- Shortness of breath or dyspnea
- Chronic coughing
- Coughing up blood or hemoptysis
- Loss of appetite
- Weight loss or cachexia
- Hoarse voice or dysphonia
- Difficulty in swallowing
- Clubbing in fingernails
However, many of the lung cancer symptoms like fever, weight loss and bone pain are non-specific. Sometimes in primary stage people considers these symptoms as comorbid illness. As a result in most of the cases when patients consult doctors the cancer already spreads significantly.
Causes of Lung Cancer:
The major causes of Lung Cancer are –
- Carcinogens: carcinogens are mostly received from smoking. Cigerettes are considered as the main cause of lung cancer as cigerettes involves almost 60 types of carcinogens. Whenever a person smokes he develops the chances of lung cancer. Even passive smoking can lead to lung cancer.
- Radon gas: Radon gas is generated from radioactive radium. It is the second major cause of lung cancer.
- Other significant causes of lung cancer are asbestos, viruses etc.