Urinary Tract Abnormalities in Children with Supernumerary Nipples

Abstract
Supernumerary nipples (accessory nipples or polythelia) are classified as minor developmental anomalies. Their incidence, as reported in different ethnic groups, varies from 0.22% to 5%.1,2 Various malformations associated with supernumerary nipples have been described in individual cases.2,3 Recently, attention was drawn to a high incidence of renal abnormalities in children with supernumerary nipples. Mehes1,4 initially evaluated 20 Hungarian children and then an additional 37 Hungarian children with supernumerary nipples and discovered urinary tract abnormalities in 15 (40%) and nine children (27%), respectively. On the other hand, Rahbar,5 using clinical criteria and urine findings, was not able to identify renal or other malformations in 22 American black neonates with supernumerary nipples.

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