Percutaneous nephrostomy in the management of acute and chronic pelveoureteral obstruction

One hundred and seven patients with an acute or chronic pelveoureteral obstruction were initially treated with a percutaneous nephrostomy. In 65/107 (61%) patients the obstruction was associated with a malignant disease while in 42/107 (39%) patients the cause of obstruction was benign, mostly an impacted ureteral stone.