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Case ReportOpen Access
Villous Adenoma of the Urinary Bladder: A Case Report
Ratanarapee S 
,
Uiprasertkul M ,
Pradniwat K ,
Soontrapa S
,
Uiprasertkul M ,
Pradniwat K ,
Soontrapa S Villous adenomas of the urinary tract are rare, in contrast to urothelial neoplasms. Most reports were scattered
individual cases. Only two case series of this entity have been published. The histopathology is identical to that of the much
more common villous adenoma of the gastrointestinal tract. The authors reported a case of urinary bladder villous adenoma
in a 41-year-old Thai patient who complained of hematuria for one day without any other symptom. Cystoscopic examination
revealed a papillary growth at the bladder neck associated with marked degree of bullous edema and bilateral mild
hydroureters. The clinical diagnosis was urothelial carcinoma. Transurethral resection was performed. Histologic examination
revealed typical features of villous adenoma. The tumor showed identical immunohistochemical profile to colonic villous
adenoma. The patient has been well for more than a year after tumor removal.
Keywords: Villous adenoma, Bladder adenoma, Cystitis glandularis
individual cases. Only two case series of this entity have been published. The histopathology is identical to that of the much
more common villous adenoma of the gastrointestinal tract. The authors reported a case of urinary bladder villous adenoma
in a 41-year-old Thai patient who complained of hematuria for one day without any other symptom. Cystoscopic examination
revealed a papillary growth at the bladder neck associated with marked degree of bullous edema and bilateral mild
hydroureters. The clinical diagnosis was urothelial carcinoma. Transurethral resection was performed. Histologic examination
revealed typical features of villous adenoma. The tumor showed identical immunohistochemical profile to colonic villous
adenoma. The patient has been well for more than a year after tumor removal.
Keywords: Villous adenoma, Bladder adenoma, Cystitis glandularis
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