Prostatic ultrasound.

Ultrasonography is a useful method of imaging the prostate gland. Perrectal ultrasonography may be used in the assessment of the enlarged or nodular prostate. Benign hyperplasia, prostatitis and prostatic carcinoma can be differentiated. In the management of patients with prostatic cancer, per-rectal ultrasound scanning is invaluable in the diagnosis, staging, treatment and follow-up of the disease.