Supernumerary Nipples and Renal Malformations: A Family Study

We describe a family with supernumerary nipples and kidney and urinary tract malformations. The proband is a 59-year-old man with a supernumerary nipple and recendy identified hypoplastic kidney, bladder diverticulum, and hypotonic bladder. His mother also has a supernumerary nipple and a recently identified hypoplastic kidney. Of his three children, all male, one has a supernumerary nipple but has not been evaluated for a kidney or urinary tract malformation. This familial disorder is discussed.