Simple renal ectopic

Renal ectopic means that a well-developed kidney cannot reach the normal position in the retroperitoneal renal fossa. Renal ectopic should be distinguished from renal sagging, which means that the kidney is initially in a normal position and has a normal blood supply, but for some reason the downward movement occurs, and the ectopic kidney is not in the normal position from the beginning. Ectopic kidneys are commonly found in the pelvis, popliteal fossa, abdomen, chest, or cross-ectopic kidneys.