What is non-small cell lung cancer?
Non-small cell lung cancer (NSCLC) is the most common type of lung cancer. It’s usually less aggressive than small cell lung cancer.
There are three main subtypes, determined by the size, shape, and chemical makeup of the cancer cells:
Adenocarcinoma accounts for about 40 percent of lung cancers. It’s usually found in the outer part of the lung.
While adenocarcinoma can occur in smokers or former smokers, it’s the most common lung cancer in non-smokers. It’s more common in people assigned female at birth and more likely to occur in younger people than other lung cancer types.
About 10 to 15 percent of lung cancers are large-cell carcinomas. They can start in any part of the lung. Large-cell carcinomas tend to grow and spread quickly, making them more difficult to treat.
About 25 to 30 percent of lung cancers are squamous cell carcinomas. Their development is linked to smoking. This type of lung cancer is often found in the middle of the lungs, near a bronchus (airway).