human
My doctor wants to take a biopsy of my prostate gland. What is a biopsy?
assistant
A biopsy is a procedure that involves taking a small sample of tissue from an organ or other part of the body for examination under a microscope. The sample is usually taken with a needle, and then sent to a laboratory for analysis. Biopsies can be used to diagnose diseases such as cancer, and to assess the effectiveness of treatment.