Lung cancer is the result of the formation of malignant cells in the lung tissue, usually in the cells of the respiratory tract ducked. The cells of our body are constantly to divide and reproduce. Normally there is a good model that the cells of reproduction and expertise for special demands. Sometimes a cell is damaged. There is a change in its DNA, and as the maturation and death, as is normal, it must be repeated, without control. In essence, the cancer - the reproduction and the uncontrolled growth of abnormal cells in the body.
Lung Cancer Cells
Most lung cancers are believed to start in the epithelial lining of the lungs - the linings of the large and small airways that perform the task of extracting oxygen from the air. Because of this, lung cancer is sometimes called bronchogenic carcinoma - cancer arising from the bronchia. A smaller percentage of lung cancers begin in the pleura - the thin tissue sac that surrounds the lungs. These cancers are called mesothelioma. The most common form of mesothelioma is linked to asbestos exposure.
Cancer of the lungs is one of the deadliest forms of cancer. While it may take a period of years to develop, the cancer often goes undetected until late in the process. In addition, it tends to metastasize (migrate to other parts of the body) early, which leaves fewer opportunities to fight the mutated cells with surgery or radiation. Once the lung cancer does metastasize, it quickly spreads to the most vulnerable and important organs of the body, particularly the adrenal glands, the liver, the brain and the bones.
There are two primary forms of lung cancer - Small Cell Lung Cancer (SCLC) and Non-Small Cell Lung Cancer (NSCLC). Small Cell Lung Cancer is less common, though far more deadly. It's directly linked to cigarette smoking - less than 1% of SCLC is diagnosed in non-smokers. It's also extremely aggressive and fast-moving, metastasizing rapidly to other organs, and often undiscovered until it's already widespread.
Non-Small Cell Lung Cancer, on the other hand, is far more common, accounting for nearly 80% of all diagnosed lung cancers. There are three main types of non-small cell lung cancer, generally characterized by the size, shape, and chemical composition of the cells that form the cancer:
Squamous Cell Carcinoma (also referred to as Epidermoid Carcinoma): accounts for around 25% - 30% of all lung cancers, and is associated with a history of smoking. This cancer is nearly always found in the central chest area, near the bronchus.
Adenocarcinoma (also referred to as Bronchioloalveolar Carcinoma): accounts for around 40% of all lung cancers, and is found in the external region of the lung. Treatment for this form of lung cancer often leads to a more successful outcome than that of other lung cancers.
Lung Cancer CellsMost lung cancers are believed to start in the epithelial lining of the lungs - the linings of the large and small airways that perform the task of extracting oxygen from the air. Because of this, lung cancer is sometimes called bronchogenic carcinoma - cancer arising from the bronchia. A smaller percentage of lung cancers begin in the pleura - the thin tissue sac that surrounds the lungs. These cancers are called mesothelioma. The most common form of mesothelioma is linked to asbestos exposure.
Cancer of the lungs is one of the deadliest forms of cancer. While it may take a period of years to develop, the cancer often goes undetected until late in the process. In addition, it tends to metastasize (migrate to other parts of the body) early, which leaves fewer opportunities to fight the mutated cells with surgery or radiation. Once the lung cancer does metastasize, it quickly spreads to the most vulnerable and important organs of the body, particularly the adrenal glands, the liver, the brain and the bones.
There are two primary forms of lung cancer - Small Cell Lung Cancer (SCLC) and Non-Small Cell Lung Cancer (NSCLC). Small Cell Lung Cancer is less common, though far more deadly. It's directly linked to cigarette smoking - less than 1% of SCLC is diagnosed in non-smokers. It's also extremely aggressive and fast-moving, metastasizing rapidly to other organs, and often undiscovered until it's already widespread.
Non-Small Cell Lung Cancer, on the other hand, is far more common, accounting for nearly 80% of all diagnosed lung cancers. There are three main types of non-small cell lung cancer, generally characterized by the size, shape, and chemical composition of the cells that form the cancer:
Squamous Cell Carcinoma (also referred to as Epidermoid Carcinoma): accounts for around 25% - 30% of all lung cancers, and is associated with a history of smoking. This cancer is nearly always found in the central chest area, near the bronchus.
Adenocarcinoma (also referred to as Bronchioloalveolar Carcinoma): accounts for around 40% of all lung cancers, and is found in the external region of the lung. Treatment for this form of lung cancer often leads to a more successful outcome than that of other lung cancers.
