transrectal biopsy

Definition of transrectal biopsy
National Cancer Institute

transrectal biopsy

(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