There are three main types of non-small-cell lung cancer.

• Adenocarcinoma: This kind of cancer grows in certain glands that produce mucus. It usually starts in the airways at the outer edges of the lungs. It is the most common type of non-small-cell lung cancer, making up about two-fifths of all cases of lung cancer.¹
• Squamous cell carcinoma: This is a slow-growing cancer that affects the airways. It makes up about one-third of all lung cancers.
• Large cell carcinoma: This type of cancer is made up of larger cells than other forms of lung cancer. About 15 percent of lung cancers are this type.¹

This information is for educational use only, and is not a substitute for prompt professional medical advice. Readers should always consult a physician or other professional for advice and treatment. ©BMJ Publishing Group Limited 2008. All rights reserved.