title: [Inverted urothelial papilloma: report of 151 cases].
abstract: OBJECTIVE
  To investigate the clinical features, pathology, diagnosis and treatment of inverted urothelial papilloma.
  
  
  METHODS
  A total of 151 cases of urothelial inverted papilloma were analysed retrospectively. Of the cases, 134 were male and 17 were female, with a mean age of 54 years old. Most patients complained of painless gross hematuria. The diagnosis could be established mainly by ultrasonic, intravenous urography, retrograde pyelography, cystoscope and pathology. Among them, 7 cases who had the papilloma at upper urinary tract underwent nephroureterectomy except one. One hundred and forty-four cases had the papilloma at low urinary tract, with 124 treated by transurethral bladder tumor resection (TURBT), among which 11 cases accompanying benign prostatic hyperplasia were treated by transurethral prostatic resection, 3 by transurethral resection of prostatic urethral tumor, 15 by partial cystectomy, 2 by total cystectomy.
  
  
  RESULTS
  One hundred and eighteen cases were followed up 1 year to 12.5 years (mean 6.3 years). Intravesical recurrence was found in 5 cases. Of them 2 cases developed malignance in 8 and 30 months postoperatively, and 1 case underwent total cystectomy.
  
  
  CONCLUSIONS
  Inverted urothelial papilloma is a benign tumor, which appears male predominant. Most of the lesions are found in the bladder. TURBT is the preferred treatment choice for inverted papilloma of the bladder. Although this disease has a good prognosis, regular follow-up observations are necessary.
authors.affiliation: Department of Urology, First Affiliated Hospital, Medical College of Zhejiang University, Hangzhou 310003, China. hz_wanqun@163.com
authors.forename: Qun
authors.initials: Q
authors.lastname: Wan
authors.forename: Jin-dan
authors.initials: JD
authors.lastname: Luo
authors.forename: Song-liang
authors.initials: SL
authors.lastname: Cai
authors.forename: Bo-hua
authors.initials: BH
authors.lastname: Shen
authors.forename: Wei-ping
authors.initials: WP
authors.lastname: Zhao
authors.forename: Zhi-gen
authors.initials: ZG
authors.lastname: Zhang
authors.forename: Li-ping
authors.initials: LP
authors.lastname: Xie
authors.forename: Zhou-jun
authors.initials: ZJ
authors.lastname: Shen
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D018308:Papilloma, Inverted / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D012189:Retrospective Studies; D014571:Urologic Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*