Bladder
Nonurothelial benign tumors
Prostatic-type polyps

Author: Tom Tong, M.D. (see Authors page)

Revised: 15 June 2016, last major update December 2014

Copyright: (c) 2003-2016, PathologyOutlines.com, Inc.

PubMed Search: Prostatic-type polyps
Definition / General
Epidemiology
  • Uncommon
  • Mean age 46-50 years
Sites
  • Usually around bladder neck or ureteral orifices
Etiology
  • Most likely a type of metaplasia; may be due to injury
  • Cases near ureteral orifices occur at younger age (mean 21 years), and may represent a developmental anomaly (Histopathology 1987;11:789)
Clinical Features
  • Frequent cause of hematuria in young adults
Case Reports
Treatment
Gross Description
  • Papillary or polypoid
Micro Description
  • Fibrovascular polyp lined by predominantly prostatic-type epithelium with foamy, faintly eosinophilic cytoplasm, with interspersed urothelium
  • Cystitis glandularis often present
Micro Images
Cytology Description
Positive Stains
Differential Diagnosis
  • Ectopic prostate: no grossly noted polyp or fibrovascular core
  • Polypoid cystitis: chronically inflamed bladder with grossly noted polypoid lesions (with edema) or papillary lesions; no prostate-type epithelium