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Renal parenchymal radiographic measurement in infants and children
Insights
Kidney mass and size ratios change significantly from birth through adolescence. Adult kidney proportions are not achieved until the second decade, impacting pediatric kidney damage assessments.
Area of Science:
- Radiology
- Human Anatomy
- Pediatric Nephrology
Background:
- Kidney size and mass are critical indicators of renal health.
- Understanding normal kidney development is essential for accurate medical assessments.
Purpose of the Study:
- To analyze the relationship between renal parenchyma mass and overall kidney size across different age groups.
- To determine when adult kidney proportions are established in human development.
Main Methods:
- Analysis of urograms from 433 pairs of normal human kidneys.
- Statistical analysis of kidney mass-to-size ratios in patients from birth to 80 years.
Main Results:
- Significant differences in kidney mass-to-size ratios were observed between the 0-5 and 5-10 year age groups.
- A significant difference was also noted in the third quinquennium (ages 10-15).
- Adult kidney proportions were not reached until the latter half of the second decade (ages 15-20).
Conclusions:
- Kidney maturation, specifically the establishment of adult proportions, occurs gradually throughout childhood and adolescence.
- Accurate interpretation of radiographic kidney measurements in children requires consideration of age-related developmental changes.
- This study highlights the importance of age-specific reference ranges for assessing pediatric kidney health and damage.
Abstract:
An analysis of the urograms of 433 pairs of normal human kidneys performed on patients ranging from birth to 80 years was carried out with the object of relating the mass of the renal parenchyma to the overall size of the kidney at different ages. Statistical analysis of the results showed that there was a highly significant difference in the ratio of mass to overall size in the age periods of 0-5 and 5-10 years, with a significant difference in the third quinquenium. Adult proportions are not reached until the latter half of the second decade of life. Recognition of this aspect of the process of maturation of normal kidneys is essential if radiographic measurement is to be used as a means of estimating kidney damage in the very young.