Bilateral ureteritis cystica with unilateral ureteropelvic junction obstruction.

Ureteritis cystica is a rare, benign, proliferative disorder characterized by multiple ureteral cysts and multiple filling defects noted on contrast ureteral imaging. A unique case of bilateral ureteritis cystica coincidental with chronic, congenital, unilateral ureteropelvic junction obstruction presenting with microscopic hematuria and lower urinary tract symptoms is described. The characteristic presentation as well as the diagnostic radiographic, ureteroscopic, and histologic features of pyeloureteritis cystica are reviewed.