Ectopic kidney with varied vasculature: demonstrated by CT angiography

Abstract

An ectopic kidney was found incidentally in a 20-year-old male patient during the abdominopelvic CT angiography. It was situated on the right side at the abdominopelvic junction, partly in the abdomen at the level of the intervertebral disc between L3 and L4 superiorly and partly in the greater pelvis at the level of the promontorium and close to the inferior border of the sacroiliac joints. It was supplied by two arteries which were nearly in the same caliber, and each of which branched from the common iliac arteries both close to the aortic bifurcation. There were two renal veins. The larger one which was emerging from the lateral part of the ectopic kidney was draining into the inferior vena cava. The smaller one which was the only hilar vessel of the ectopic kidney was draining into the left common iliac vein. The orthotopic left kidney was also supplied by two arteries from the abdominal aorta. Ectopic kidneys pose a problem for any planned surgical intervention given their anomalous blood supply. Ectopic position and varied vasculature can predispose to iatrogenic trauma during interventional radiological and laparoscopic procedures, and emergency operations.

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