Fused Supernumerary Kidney Presenting as Total Urinary Incontinence.

Supernumerary kidney, a rare congenital anomaly, defined as an additional kidney with a separate capsule, collecting system and blood supply draining into the native ureter or a separate ureter. Small fused supernumerary units may be difficult to differentiate from renal moiety with complete separate ectopic ureter without complete evaluation. We report a case of a supernumerary kidney fused with the capsule of ipsilateral kidney with a separate complete ureter draining into the introitus of a young female thereby presenting as total incontinence of urine.