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Inverted papilloma of the urinary bladder: Rigorous surveillance needed? An Indian experience

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Author(s): Tiwari P | Tripathi A | Vijay M | Mitra B | Kumar S | Pal D | Kundu A

Journal: Indian Journal of Cancer
ISSN 0019-509X

Volume: 47;
Issue: 4;
Start page: 418;
Date: 2010;
Original page

Keywords: Bladder | inverted papilloma | surveillance protocol

ABSTRACT
Aims: Inverted papilloma (IP) is an uncommon benign neoplasm of the urinary tract. Its multiplicity, recurrence, and association with transitional cell carcinoma (TCC) leads to conflicting clinical conclusions regarding its biological behavior, and hence, the need for rigorous follow-up protocols. In this study, we review all cases of urinary bladder IP in our institution and determine the need for strict follow-up. Materials and Methods :0 We included consecutive patients from August 2004 to August 2008 with IP of the urinary bladder in this study who did not have prior or concurrent urothelial carcinoma. A single pathologist performed the histologic review. The patients had undergone strict a follow-up schedule every 6 months. Results: In our study of the 24 patients, the mean age at presentation was 53.5 (range 22-81) years. The mean follow-up period was 25.8 months (range 6-58 months). Of the 24 patients, 21 were men and 3 were women. No patient had a synchronous or previous bladder tumor. The most common presenting symptoms were macroscopic hematuria and dysuria. All were solitary tumors except one, most commonly found at the bladder neck and trigone. The average follow-up period was 2.5 years without any evidence of recurrence. Conclusions: We conclude that when diagnosed by strictly defined criteria, IP as benign urothelial neoplasm was with extremely low incidence of recurrence and good prognosis. It does not seem to be a risk factor for TCC, especially if located in the bladder. Therefore, a good transurethral resection is adequate therapy and follow-up protocol as rigorous as those for TCC may not be necessary.
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