A Rare Case of Malrotated and Fused Supernumerary Kidney

Supernumerary kidney is a rare congenital anomaly which may be defined as an additional kidney with separate capsule, blood supply, and collecting system draining into a common or separate ureter. Sometimes small fused supernumerary kidney may be difficult to differentiate from a renal moiety with a separate collecting system including the ureter. There have been fewer than 100 cases reported in literature of fused supernumerary kidney(1). We present a case of S-shaped fused supernumerary kidney.