systematic biopsy
(SIS-tuh-MA-tik BY-op-see)
A procedure in which many samples of tissue (usually 12) are removed via a long needle from different areas of the prostate to examine under a microscope. An ultrasound is used to guide the needle through the rectum into the prostate. This type of biopsy does not target specific areas of the prostate. Systematic biopsy is used to help diagnose prostate cancer.