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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.

Needle biopsy is used when a lesion or tumor can be felt or identified on imaging studies. During the procedure, a thin hollow needle is inserted into the lesion and guided by x-ray or ultrasound equipment. A small ... more