Pronunciation: (tranz-REK-tul BY-op-see)
A procedure in which a sample of tissue is removed from the prostate using a thin needle that is inserted through the rectum and into the prostate. Transrectal ultrasound (TRUS) is usually used to guide the needle. The sample is examined under a microscope to see if it contains cancer.
Source: NCI Dictionary of Cancer Terms
Caption: Transrectal biopsy. An ultrasound probe is inserted into the rectum to show where the tumor is. Then a needle is inserted through the rectum into the prostate to remove tissue from the prostate.2003-07-26 Date last modified: 2006-01-04