Bladder, ureter & renal pelvis
Other nonneoplastic
Prostatic-type polyps

Topic Completed: 1 December 2014

Revised: 20 December 2018

Copyright: (c) 2003-2018,, Inc.

PubMed Search: Prostatic-type polyps

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Cite this page: Tong T Prostatic-type polyps. website. Accessed August 10th, 2020.
Definition / general
  • Uncommon
  • Mean age 46-50 years
  • Usually around bladder neck or ureteral orifices
  • 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
Gross description
  • Papillary or polypoid
Microscopic (histologic) description
  • Fibrovascular polyp lined by predominantly prostatic-type epithelium with foamy, faintly eosinophilic cytoplasm, with interspersed urothelium
  • Cystitis glandularis often present
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
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