Lung cancer is a cancer of the trachea (windpipe), bronchi (airways) or lung air sacs (alveoli).
The two most common types of lung cancer are:
- Non-small cell lung cancer (NSCLC)
Around 70–80% of people with lung cancer have NSCLC. The most common forms of NSCLC are adenocarcinoma or squamous cell carcinoma.
- Small cell lung cancer (SCLC)
Around 20% of people with lung cancer have SCLC.
Rarer forms of lung cancer are covered in our rare lung cancers factsheet.
Information on mesothelioma, a type of cancer that grows in the lining around the lungs usually caused by asbestos dust, can be found here occupational lung disease.