Non-Small Cell Lung Cancer
Non-small cell lung cancer accounts for 85 to 90 percent of lung cancers. The main types of non-small cell lung cancer are:
- Squamous cell carcinoma (also called epidermoid carcinoma) often begins in the bronchi near the middle of the lungs.
- Adenocarcinoma usually begins along the outer edges of the lungs. It is the most common type of lung cancer in people who have never smoked.
- Large cell carcinomas are a group of cancers with large, abnormal-looking cells related to hormone secreting glands. These tumors may begin anywhere in the lungs and grow quickly.
Small Cell Lung Cancer
Small cell lung cancer is sometimes called oat cell cancer. It grows rapidly and spreads to other organs. There are two types:
- Limited. Cancer is generally found in one lung. There may be cancer in nearby lymph nodes on the same side of the chest.
- Extensive. Cancer has spread beyond the primary tumor in the lung into other parts of the body.