Abstract
Ureteropelvic junction obstruction with concomitant ureterovesical junction obstruction is a rare condition whose treatment remains challenging [1-3]. Renal ultrasonography and diuretic renogram are universally utilized to assess a patient prior to pyeloplasty; however, the role of retrograde pyelography at the time of pyeloplasty is still debatable [5-7]. Herein, we describe two cases where the use of retrograde pyelography preoperatively helped to avoid pyeloplasty failure by allowing the surgeon to visualize a concurrent ureterovesical junction obstruction, which would not have been visible in the surgical field had the procedure been carried out without intraoperative imaging.
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