National Cancer Institute
backindexnext
Science Behind the News Understanding Cancer
 
Illustration of people thinking about cancer related questions.

What is Cancer?

The term "cancer" refers to a group of diseases in which cells grow and spread unrestrained throughout the body. It is difficult to imagine anyone who has not heard about this disease. Most people have been affected because either a loved one, a friend, or even they themselves are cancer survivors.

It is therefore important for everyone to have a basic understanding about the nature, diagnosis, causes, prevention, and treatment of cancer.

This tutorial will help you find answers to many of your questions about the nature, causes, and prevention of cancer. You may use the program from start to finish or visit sections of particular interest one at a time. Learn about the following topics:

What is cancer?
How is cancer detected and diagnosed?
What causes cancer?
What is the link between genes and cancer?
What is cancer prevention?



 
page 1page 2page 3page 4page 5page 6page 7page 8page 9page 10page 11page 12page 13page 14page 15page 16page 17page 18page 19page 20page 21page 22page 23page 24page 25page 26page 27page 28page 29page 30page 31page 32page 33page 34page 35page 36page 37page 38page 39page 40page 41page 42page 43page 44page 45page 46page 47page 48page 49page 50page 51page 52page 53page 54page 55page 56page 57page 58page 59page 60page 61page 62