purpose:to improve the understanding of obstructive anuria of upper urinary tract(oauut) and upgrade the diagnosis and treatment level.
目的:提高上尿路梗阻性无尿的认识和诊治水平。
the common causes of acute obstructive anuria were calculi (27/58 ) , tumors (18/58) , stricture of ureter (4/58) and retroperitoneal fibrosis (3/58) .