Ectopic Supernumerary Kidney, A Cause of Para-Aortic Mass: Case Report and Review

Bernik, Thomas R.; Ravnic, Dino J.; Bernik, Stephanie F.; Wallack, Marc K.
July 2001
American Surgeon;Jul2001, Vol. 67 Issue 7, p657
Academic Journal
Ectopic supernumerary kidney is a rare congenital urinary tract abnormality. Because of the scarcity of published cases and atypical presenting symptomatology this entity frequently causes a diagnostic as well as therapeutic dilemma. We report a case of an unusually symptomatic supernumerary kidney that presented as back pain. Noncontrast CT scan showed a suspicious left-sided para-aortic mass, which prompted a percutaneous biopsy. Intravenous contrast CT scan revealed an anatomically and functionally free supernumerary kidney. The approach to diagnosis as well as management of supernumerary kidneys is discussed herein.


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