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Updated April 15, 2014

Definition: A subtype of cancer that arises from epithelial cells. Epithelial cells form the linings of our internal organs, cavities, glands, and skin.

Carcinomas account for about 80% of all cancers. They can occur just about everywhere in the body. Examples include basal cell carcinoma, renal cell carcinoma, and squamous cell carcinoma.

The major types of cancer are: carcinomas, sarcomas, blood or hematopoietic, and neuroendocrine.
Adenocarcinoma is a type of cancer that originates in a gland.
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