What is CANCER?

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. a group of pathological conditions characterized by the abnormal growth of cells. Locally, this abnormal mass may develop into a malignant tumor known as a neoplasm. It invades neighboring tissues and spreads to other organs via the bloodstream in a process called metastasis.

CANCER: "A carcinoma is a cancer involving the epithelial cells of organs such as the skin, breast, uterus, and stomach."

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