可见双侧肾脏都有两个输尿管，通向膀胱(已剖开)。表面光滑的正常两肾间，可见一小段主动脉。1/150的人会出现部分或全部的单侧或双侧的双输尿管。因为尿流的异常及两个输尿管在膀胱的开口接近，可能导致阻塞。但总的来说，双输尿管是偶然发现的（泌尿科医生除外）。
Double ureters are seen exiting from each kidney and extending to the bladder that has been opened. A small segment of aorta is seen between the normal, smooth-surfaced kidneys. A partial or complete duplication of one or both ureters occurs in about 1 in 150 persons. There is a potential for obstructive problems due to the abnormal flow of urine and the entrance of two ureters into the bladder in close proximity, but most of the time this is an incidental finding (except to a urologist).
