Inflammatory pseudotumor of bladder: report of 2 cases and review of literature.

Received May 2006 Accepted February 2007 INTRODUCTION Inflammatory pseudotumor of the bladder is a rare benign proliferative lesion that resembles a neoplastic tumor.(1-5) Most of the tumors of the bladder are malignant, and transitional cell carcinoma is the most common malignant tumor; however, other tumors such as adenocarcinoma, squamous cell carcinoma, sarcoma, and teratoma have to be included in the differential diagnosis. In fact, their clinical manifestations are similar and patients usually present with hematuria (painless and microscopic or gross). Pelvic pain and urinary bladder irritation may be seen uncommonly. These symptoms may also be caused by nonmalignant conditions such as clustering polypoid cystitis or granulomatous cystitis. These lesions may mimic malignant tumor.(5,6) We report 2 cases of inflammatory pseudotumors of the bladder presented with gross hematuria and urinary symptoms. We reviewed the literature and found few cases of pseudotumor, and our cases were unique in terms of their etiologies.(7-9)