Supernumerary Kidney (Triple Kidney) With Horseshoe Malformation: A Case Report

The presence of an extra (third) kidney is an unusual congenital anomaly of the urinary system (US), having less than a hundred cases reported globally. Owing to the rare occurrence of this complex anomaly, the fused supernumerary kidney and horseshoe portion is very scarcely reported with unknown incidence. This paper presents a rare renal anomaly case of a fused supernumerary kidney with a horseshoe portion in a 41-year-old male who presented with fever, abdominal pain, and burning micturition. CT of the kidney urinary bladder showed non-rotation of the right kidney with a supernumerary malrotated horseshoe-shaped kidney and malrotated left kidney with features of acute pyelonephritis. The patient was managed with double J stenting and appropriate antibiotics till discharge.