“…24 This association is not found within the black American population. [25][26][27] Renal anomalies found in association with supernumerary nipples Mehes 7 Bilateral hydronephrosis Goedert et al 11 Duplicate renal arteries, renal adenocarcinoma, renal cysts a Rintala 17 Double renal pelvis and ureter a Kahn 18 Renal agenesis Mehes 19 Hydronephrosis, megaureter, duplicate ureter Varsano et al 20 Double excretory systems, bilateral polycystic kidneys, hydronephrosis and ureteropelvic junction stenosis, ureteral prolapse Hersh et al 18 Unilateral multicystic kidney, conjoined kidneys, unilateral duplicated collecting system, unilateral renal agenesis, bilateral hydronephrosis and megaureter, unilateral hydronephrosis and bladder neck obstruction, renal cysts, small normally functioning kidney b Meggyessy and Mehes 16 Duplication of kidney and ureter, hydronephrosis, megaureter, Wilms tumor, hypoplastic kidney, microcystic kidney, large parenchymal cyst Leung 10 Renal cysts c Mehes and Pinter 21 Renal dysplasia, hydronephrosis, polycystic kidneys, duplication of kidney and ureter Toumbis-Ioannou and Cohen 21 Ectopic kidney a Urbani and Betti 23 Adult dominant polycystic kidney disease, unilateral renal agenesis, cystic renal dysplasia, familial renal cysts, congenital stenosis of pyeloureteral joint b a Cases with renal abnormalities and familial polythelia without testing of family members with supernumerary nipples for renal abnormalities. b Cases with confirmed familial renal abnormalities as well as familial polythelia.…”