Clear cell renal cell carcinoma in crossed fused renal ectopia: A case report

Abstract

Crossed fused renal ectopia is an uncommon entity to be seen in clinical practice, owing to its silent clinical nature. Reports of renal malignancies in crossed fused ectopic kidneys have been made very rarely. We are going to present the case of a 40-years old male patient, who came to our institute with the complaints of abdominal pain. His ultrasound scan showed a suspected mass lesion in right kidney. His left renal fossa was empty and left kidney was not visualized in expected ectopic areas. Further CT urography images show left to right crossed fused ectopia with an enhancing mass lesion in lower entity. Biopsy confirmed the diagnosis of clear cell renal cell carcinoma. Crossed-fused renal ectopia (CRFE) with a renal malignancy is a very rare entity which presents a difficult task for the surgeon in surgical decision making, due to its location, complex vascular connections and collecting system. Hence, detailed imaging work-up with cross sectional and angiography imaging is necessary for surgeon to choose to best operative method, to avoid complications during and after surgery.