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Carcinoma - Definition of Carcinoma, Breast Cancer

By , About.com Guide

Updated April 26, 2011

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Definition: A malignant tumor of the type of cells called "epithelial."

A layer of cells that line the skin, intestines, lung, stomach, bowels, or breast lobules are called epithelial cells.

About 80 of all cancers are carcinomas. Much of the time, the words carcinoma and cancer are used interchangeably, since they often refer to the same condition.

If cancer is found in the connective tissue instead of epithelial tissue, then it is called sarcoma. If cancer cells are found in the white blood cells, it is called leukemia.
Pronunciation: car-si-no-muh
Also Known As: cancer
Common Misspellings: carsinoma
Examples:
Lobular carcinoma is a type of breast cancer which requires surgery, and sometimes radiation treatments.

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