[Double hemorrhagic complication of endo-urologic drainage in single kidney].

Hemorrhage is the most worrisome complication of percutaneous renal procedures, and usually occurs early in the postoperative period. The incidence of severe arterial injury is 1 to 2%. We report a patient who had 2 bleeding episodes on a solitary kidney. The first, which occurred early after the procedure, was due to an arteriocaliceal fistula treated by coil embolization. The second bleeding episode occurred two weeks later, and was caused by erosion of a lumbar artery; it was embolized by microparticles. To our knowledge, this is the first report of the imaging findings. In summary, when bleeding occurs after endourologic procedures, renal as well as extrarenal parietal causes should be investigated.