Crossed renal ectopia. Reports of two cases, one with abnormal renal pelvic peristalsis.

Two cases of crossed renal ectopia are presented. One of the patients had two non-fused kidneys on the right side. The bifid pelvis of the crossed kidney showed abnormal peristalsis which delayed emptying. This delay was relieved by resection of a dilated limb of the bifid pelvis. In the other case there was a single, crossed kidney with anomalous blood supply from the contralateral common iliac artery.