Ectopic kidney

Ectopic kidney

This occurs when the mature kidney fails to reach its normal location in the lumbar region. The incidence is 1 in 500–1200. An ectopic kidney ( Figure 82.1 ) may be found anywhere along the path of ascent: pelvic, iliac, abdominal and rarely thoracic. When the ectopic kidney is located on the contralateral side to its ureteric insertion, it is called crossed ectopia. Renal ectopia may be associated with reflux in the ectopic or orthotopic kidney and with pelviureteric junction (PUJ) and ureterovesical junction (UVJ) obstruction.