When doctors use terms such as carcinoma, sarcoma, and melanoma to describe cancers, they are naming them according to the

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These terms are used to classify cancers based on the type of cells from which they originate. Carcinoma refers to cancer that begins in the skin or in tissues that line or cover internal organs, sarcoma refers to cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue, and melanoma refers to cancer that begins in the cells that produce pigment.

When Doctors Use Terms Such as Carcinoma, Sarcoma, and Melanoma