Oct 11, 2021 · Explanations about what cancer is, how cancer cells differ from normal cells, and genetic changes that cause cancer to grow and spread.

A term for diseases in which abnormal cells divide without control and can invade nearby tissues. Cancer cells can also spread to other parts of the body through the blood and lymph systems.

Cancer is not one disease, but a collection of related diseases that can occur almost anywhere in the body. At its most basic, cancer is a disease of the genes in the cells of our body.

Accurate, up-to-date, comprehensive cancer information from the U.S. government's principal agency for cancer research.

Jan 17, 2025 · Metastatic cancer is cancer that spreads from its site of origin to another part of the body. Learn how cancer spreads, possible symptoms, common sites where cancer spreads, …

A cancer is always referred to by the stage it was given at diagnosis, even if it gets worse or spreads. New information about how a cancer has changed over time is added to the original …

Breast cancer forms in the tissues of the breast. Learn about where breast cancer starts and access information about symptoms, treatments, and more.

The simplest definition is from the American Cancer Society (ACS). According to the ACS, cancer is a group of diseases characterized by uncontrolled growth and spread of abnormal cells.

In medicine, an abnormal lesion or growth in or on the body may be benign (not cancer), precancerous or premalignant (likely to become cancer), or malignant (cancer).

If you have cancer, you may have questions about how serious your cancer is and your chances of survival. The estimate of how the disease will go for you is called prognosis. It can be hard …