Bladder
Nonurothelial benign tumors
Prostatic-type polyps



Topic Completed: 1 December 2014

Revised: 20 December 2018

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PubMed Search: Prostatic-type polyps
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Cite this page: Tong T Prostatic-type polyps. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/bladderprostatepolyp.html. Accessed June 16th, 2019.
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
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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