A CASE OF GROSS HEMATURIA ARISING DURING EMBOLIZATION FOR RENAL ARTERIOVENOUS MALFORMATION

A cirsoid type of arteriovenous malformation was treated successfully by superselective embolization using a platinum micro coil and absorba ble gelatin sponge, During the procedure, as soon as the arteriovenous shunt had disappeared, an arteriopelvic shunt appeared. The pyelogram showed that the high pressure arterial blood flow drained directly in to the pelvic cavity, Massive gross hematuria occurred immediately acc ompanied by a sudden blood pressure drop to 60 mm Hg, necessitating bl ood transfusion. Fortunately this complication was managed successfull y, To our knowledge, there are-only a few reported cases that make ref erence to gross hematuria occurring on embolization. We discuss the po ssible causes of this complication and the mechanism of occurrence of gross hematuria in renal arteriovenous malformation.