title: Exophytic benign prostatic hyperplasia.
abstract: A 60-year-old man had incidental finding of a multilobular 8 × 7 × 7-cm mass identified posterior to the urinary bladder in continuity with the prostate. The man's prostate-specific antigen was 1.87, and he denied any lower urinary tract symptoms. A transrectal ultrasound-guided biopsy demonstrated benign prostatic tissue. A computed tomography-guided needle aspiration demonstrated a benign epithelium-lined cyst, likely prostatic in origin. Benign prostatic hyperplasia is a proliferation of prostatic epithelial and stromal cells. Although prostatic hyperplasia is usually restricted to the prostate gland, hyperplastic nodules occasionally protrude outside the prostate and rarely form exophytic pelvic masses.
authors.affiliation: Department of Urology, University of California, San Francisco, USA. blaschkosd@urology.ucsf.edu
authors.forename: Sarah D
authors.initials: SD
authors.lastname: Blaschko
authors.forename: Michael L
authors.initials: ML
authors.lastname: Eisenberg
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D011470:Prostatic Hyperplasia / Q000175:diagnosis*