About 80-85% of lung cancer cases are NSCLC.

There are 3 main types of NSCLC:

  • Squamous cell carcinoma (SCC) represents 25% of lung cancers. It usually develops in cells lining the bronchi and larger bronchioles, and is often found in the central areas of the lung. SCC is quite common in smokers. Men are more likely to develop squamous cell carcinoma than women.
  • Adenocarcinoma represents 40% of lung cancers. It usually starts in mucus-producing glands and is often found in the outer edges of the lungs. It is the most common form of lung cancer in general, as well as in women and non-smokers. Adenocarcinomas may result from known genetic changes.
  • Large cell carcinoma (LCC) represents 10% of lung cancers. It can occur anywhere in the lungs but is usually found near the surface and outer edges of the lungs. LCC may grow to a very large size before causing any symptoms.