WebMD eHealth Tools
 |  |
 | |
| 1. Definitions / 2. Symptoms | |
 |
What is Breast Cancer?DefinitionNormal cells can turn into cancer because of genetic inheritance or repeated exposure to a cancer-related substance in the environment, such as alcohol, dietary fat, or excessive X-ray radiation. When cells become cancerous, they divide out of control, forming tumors and potentially spreading to other parts of the body. When cells in the breast are affected this way, breast cancer results. |
| Copyright ® 2001 WebMD Corportation. All Rights Reserved | |
