# Biopsy --- A **biopsy** is a type of diagnostic testing used to determine the exact nature of a [[disease]]. Basicaly a doctor removes a small portion of an affected tissue and it can be sent to a [[labs]] to run differnt tests on it to determine the type of cells in the sample. Often used to determine things like [[cancer]]. Common ones are **skin biopsies** to determine the specific nature of a [[skin lesion]]. These can be punched out, shaved off, incised or excised, depending on the circumstance. Can also be done on: - bone - bone marrow - brain (probably) ___