title: [Inverted papilloma of the bladder].
abstract: OBJECTIVE
  To report a series of patients with bladder inverted papilloma, pointing out the clinical features, presentations, treatment options and outcomes. We also perform a bibliography review oriented to the diagnostic criteria, treatment options and prognosis of the inverted papilloma.
  
  
  METHODS
  We reviewed the medical charts of all patients with the diagnosis of bladder inverted papilloma treated by our group between July 1996 and June 2003.
  
  
  RESULTS
  16 cases of inverted papilloma of the bladder were diagnosed in ten males and six females, with a mean age of 53.1 yr. (range 31-72). The most frequent reason for consultation was voiding urgency (43.7%), followed by hematuria (37.5%). In 14/16 patients the lesion was localized in the bladder trigone. Transurethral resection of the lesion was performed in all patients. Two cases (12.5%) presented associated transitional cell carcinoma.
  
  
  CONCLUSIONS
  The inverted papilloma is a rare pathologic entity Despite the absence of agreement about its aggressiveness or innocuousness we consider its potential malignancy should be taken into consideration after the evidence of recurrences and its association with transitional cell carcinoma.
authors.affiliation: Unidad de Endourología y Laparoscopía Urológica, Clinica Santa María, Universidad de Chile. octaviocastillo@vtr.net
authors.forename: Octavia
authors.initials: O
authors.lastname: Castillo
authors.forename: Jorge
authors.initials: J
authors.lastname: Hoyos
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Vitagliano
authors.forename: Leonardo
authors.initials: L
authors.lastname: Arellano
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018308:Papilloma, Inverted / Q000175:diagnosis / Q000601:surgery; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis / Q000601:surgery