[False aneurysm with secondary AV fistula after partial nephrectomy: diagnosis and therapy].

The increasing number of partial nephrectomies is accompanied by a higher incidence of rare iatrogenic vascular malformation. In the present case, an aneurysm with secondary arteriovenous (AV) fistula that developed after partial nephrectomy with a complicated course is described. The fistula was diagnosed during the sonographic follow-up in an asymptomatic patient. Due to the high flow rate of the shunt, the aneurysm was treated using open surgery.