A biopsy is a sample of tissue taken from the body in order to examine the tissue. A doctor recommends a biopsy when an initial test on specific area of tissue in the body isn't normal. Medical term for an area of abnormal tissue is called as a lesion, a tumor, or a mass. These are general words used to indicate the unknown nature of the tissue. The abnormal area may be noticed during a physical examination or internally on an imaging test. Biopsies are most often done to identify cancer. But biopsies can help identify many other conditions also.
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