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Anterior fontanelle size in Nigerian children
O O Omotade1, C M Kayode, A A Adeyemo
1Institute of Child Health, University College Hospital, Ibadan, Nigeria.
Insights
This study tracked anterior fontanelle (AF) size in Nigerian infants, finding significant racial differences in AF dimensions and closure rates compared to other populations. Local reference data is crucial for accurate assessment.
Area of Science:
- Pediatrics
- Anthropology
- Human Biology
Background:
- The anterior fontanelle (AF) is a key indicator of infant growth and development.
- Understanding variations in AF dimensions and closure is essential for clinical assessment.
Purpose of the Study:
- To investigate anterior fontanelle (AF) dimensions and closure patterns in Nigerian infants.
- To compare these findings with data from other racial groups.
- To establish local reference standards for AF assessment.
Main Methods:
- A cross-sectional study was conducted on 337 healthy Nigerian infants aged 1 week to 12 months.
- Anterior fontanelle (AF) dimensions were measured.
- Closure rates were recorded at different age intervals.
Main Results:
- Mean AF size decreased from 3.4 cm in neonates to 0.8 cm by 10-12 months.
- Anterior fontanelle (AF) closure occurred in 11% of 4-6-month-olds and 53% of 10-12-month-olds.
- Neonatal AF size was larger than in Caucasian/Chinese infants, but smaller by 12 months, indicating potential racial differences.
Conclusions:
- Significant racial variations exist in anterior fontanelle (AF) size and closure timing.
- Local reference data is necessary for accurate interpretation of AF measurements in Nigerian infants.
- These findings highlight the importance of considering ethnicity in pediatric assessments.
Abstract:
Anterior fontanelle (AF) dimensions were studied in 337 normal and apparently healthy Nigerian infants aged from 1 week to 12 months in Ibadan, Nigeria. Mean anterior fontanelle size fell from 3.4 cm in neonates to 2.5 cm at 4-6 months and to 0.8 cm at 10-12 months. The anterior fontanelle was closed in 11% of 4-6-month-olds and 53% of 10-12-month-olds. The mean AF size in neonates was larger than published figures from Caucasian and Chinese populations, but at 12 months mean AF size in Nigerian infants was smaller than published Caucasian and Chinese figures. The quartiles of the distribution of the AF size are also presented. It is concluded that there may be important racial differences in AF sizes and closure and closure frequencies in the 1st year of life and that appropriate local references should be used when attempting to classify a given AF size as normal or abnormal.