Explains how cancer develops and spreads, some causes of cancer, different types, how it is diagnosed, signs and symptoms of cancer, treatments, and tips for preventing it.

This site discusses, through a series of questions and answers, the benefits of smoking cessation. Also provides links to definitions of many of the terms used throughout the site.

This site provides information on virtually every type of cancer. Information can be found on prevention, causes, detection, treatments, research, and support groups.

This site provides extensive information about the relationship of genetics to cancer.