Late presentation of supernumerary kidney in a 35-year-old man: a case report

The supernumerary kidney is the rarest of all renal anomalies, and few cases have been diagnosed and reported over the years. Supernumerary kidneys are most commonly located on the left side of the abdomen with associated pathologic conditions which include malformations of the upper urinary tract and genital tract. More importantly, it usually presents with either unusual abdominal mass or features of urinary tract infections which might pose diagnostic challenges due to infrequent occurrence. In this case report, we present a 35-year-old man with a right-sided unilateral supernumerary kidney complicated by pyelonephritis. He was treated with antibiotics, and the treatment outcome was satisfactory.