Pseudoureteroceles following extracorporeal shock wave lithotripsy

Routine follow-up urography demonstrated pseudoureteroceles caused by impacted calculus fragments in the distal portion of the ureter in five patients who had undergone extracorporeal shock wave lithotripsy of renal calculi 4-6 weeks before. Although all five patients showed some degree of obstruction at the time of follow-up urography, four were asymptomatic. Either small isolated fragments (two patients) or a column (steinstrasse) of fragments (three patients) was responsible for the abnormality. Two patients required further intervention to relieve the obstruction.