There are two main types of lung cancer
Non-small Cell Lung Cancer (NSCLC)
About 80% to 85% of lung cancers are NSCLC. The main subtypes of NSCLC are adenocarcinoma, squamous cell carcinoma, and Non-small cell carcinoma. These subtypes, which start with different types of lung cells, are grouped as NSCLC because their treatment and prognosis (outlook) are often similar.
Adenocarcinoma: Adenocarcinomas start from cells that normally secrete substances such as mucus. This type of lung cancer mainly affects smokers or even those who have been smokers before. However, it is also the most common type of lung cancer in non-smokers. It is more common in women than men and is more common in young people than other types of lung cancer. Adenocarcinoma is usually found on the outside of the lungs and may be seen before it spreads to the body.
Squamous cell carcinoma: Squamous cell carcinoma begins in squamous cells that are flat and line the airways of the lungs. They are often associated with a history of smoking and tend to be located in the central part of the lungs, near the main airways (bronchi).
Non-small cell cancer: Non-small cell carcinoma can appear in any part of the lung and tends to grow and spread rapidly, which can make it difficult to treat. It is a type of Non-small cell cancer, known as a Non-small cell of the nerve and endocrine cells, and is very similar to small cell lung cancer.
Small Cell Lung Cancer (SCLC)
About 10 to 15% of all lung cancers are SCLC. This type of lung cancer grows and spreads faster than NSCLC. Because the cancer grows rapidly, it responds well to chemotherapy and radiation. Unfortunately, for most people, cancer comes back at some point.