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Updated: Aug 16, 2026

Estimation of Nephron Number in Whole Kidney using the Acid Maceration Method
Published on: May 22, 2019
Supernumerary nipples and renal anomalies
Insights
Supernumerary nipples, extra nipples along the milk line, were found in 4.29% of newborns and 5.86% of schoolchildren. This study found no significant link between supernumerary nipples and renal malformations.
Area of Science:
- Pediatrics
- Medical Genetics
- Human Biology
Background:
- Supernumerary nipples, also known as accessory nipples, are a relatively common congenital anomaly.
- Previous research suggests a potential association between supernumerary nipples and urogenital malformations.
Purpose of the Study:
- To investigate the prevalence of supernumerary nipples in different pediatric age groups.
- To determine if there is a statistically significant correlation between supernumerary nipples and renal malformations.
Main Methods:
- A total of 504 supernumerary nipples were identified in newborn infants, schoolchildren, and pediatric patients.
- Renal malformations were assessed using ultrasound in children with supernumerary nipples and in control groups.
- Control groups included acutely ill pediatric patients and newborn infants undergoing routine ultrasound screening.
Main Results:
- The prevalence of supernumerary nipples was 4.29% in newborn infants and 5.86% in schoolchildren.
- Renal anomaly prevalence was 3.74% in children with supernumerary nipples versus 3.17% in controls.
- In newborn infants, renal anomaly prevalence was 2.86% with supernumerary nipples versus 1.89% in controls.
Conclusions:
- The study found no significant difference in the prevalence of renal malformations between individuals with and without supernumerary nipples.
- The findings suggest that supernumerary nipples may not be a reliable indicator of underlying renal anomalies in pediatric populations.
Abstract:
The authors found a total of 504 supernumerary nipples in healthy newborn infants, schoolchildren and patients in the paediatric ward and outpatient clinic. The prevalence of supernumerary nipples was 4.29% among newborn infants and 5.86% among schoolchildren; 496 children with supernumerary nipples were examined with ultrasound for renal malformations and 410 acutely ill patients served as controls. The other control group consisted of 1957 newborn infants routinely screened by ultrasound. The prevalence of renal anomalies was 3.74% in children with supernumerary nipples, 3.17% in the control group, 2.86% in newborn infants with supernumerary nipples and 1.89% in control newborn infants. The differences are not significant.
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