Wednesday, September 25, 2013
Non-small cell lung cancer, or NSCLC, is the most common type of lung cancer, with about 85 to 90 percent of lung cancers falling into this category.
There are three main subtypes of NSCLC: squamous cell (epidermoid) carcinoma, adenocarcinoma and large cell (undifferentiated) carcinoma.
Roughly 25 to 30 percent of all lung cancers are squamous cell carcinomas, which start in the flat cells known as squamous cells that line the inside of the airways in the lung.
Usually found in the middle of the lungs, these squamous cells are typically linked to a history of smoking.
Adenocarcinomas account for approximately 40 percent of lung cancer diagnoses, and these start in the early versions of the cells that are normally responsible for secreting mucus.