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A biopsy is a procedure in which a sample of tissue is removed from the body for examination. A diagnosis is made when cells are examined through a microscope. There are several ways biopsy samples can be obtained.

A punch biopsy is used for obtaining full-thickness samples of the skin. A special instrument, called a punch, is used to create a small hole, or punch, in the skin. This punch works much like a cookie-cutter to ... more