Age-Specific Ultrasound Reference Data for the Laterolateral Rectal Diameter in Healthy Children.
7 affiliations
- 1Institute of Anatomy "Niko Miljanic", Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia.
- 2Department of Radiology, University Children's Hospital, 11000 Belgrade, Serbia.
- 3Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia.
- 4National Heart and Lung Institute, Imperial College London, London SW3 6LY, UK.
- 5Department of Anatomy, Faculty of Medicine Foca, University of East Sarajevo, 73300 Foča, Bosnia and Herzegovina.
- 6Department of Urology, University Children's Hospital, 11000 Belgrade, Serbia.
- 7Institute for Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia.
Abstract
Background: Transabdominal ultrasonographic measurement of rectal diameter is increasingly used as a non-invasive adjunct for assessing rectal distension and fecal loading in children. However, interpretation is limited by the lack of age-stratified reference data in pediatric populations without bowel dysfunction. This study aimed to characterize the distribution of the laterolateral (LL) rectal diameter across childhood and adolescence and provide preliminary age-stratified empirical reference percentiles. Methods: This single-center cross-sectional study included pediatric participants aged ≤18 years who underwent clinically indicated abdominal ultrasonography for reasons unrelated to bowel or anorectal disorders and fulfilled predefined eligibility criteria. Maximal LL rectal diameter was measured transabdominally using a standardized protocol. Empirical percentiles were calculated for four age groups (6-36, 37-72, 73-144, and 145-216 months), with precision assessed using non-parametric bootstrap resampling with 10,000 repetitions. Results: The cohort comprised 188 participants: 46, 43, 62, and 37 in the four age groups, respectively; 107 (56.9%) were boys. Overall LL rectal diameter was 3.55 ± 1.46 cm (median, 3.20 cm; IQR, 2.50-4.30 cm), ranging from 1.01 to 8.00 cm. The LL diameter differed significantly across age groups (p = 0.002), with mean values increasing from 3.02 cm in the youngest group to 3.96 cm in the oldest group. No significant sex-related difference was observed (p = 0.843). P5-P95 ranges were 1.60-4.90, 1.51-5.89, 2.20-6.59, and 2.27-7.00 cm, respectively. Bootstrap confidence intervals were wider for extreme percentiles, particularly in smaller age strata. Conclusions: LL rectal diameter shows substantial interindividual variability and a modest age-related increase during childhood. These findings provide preliminary age-stratified empirical reference data rather than diagnostic thresholds or definitive normative limits. Larger multicenter studies are needed for external validation and more precise estimation of extreme percentiles.
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BibTeX
@article{pucar2026agespecific,
title = {{Age-Specific Ultrasound Reference Data for the Laterolateral Rectal Diameter in Healthy Children.}},
author = {Aleksandra Pucar and Sofija Cvejić and Darko Laketić and Dubravka Milutinović and Luka Đjoković and Teodora Pecarski and Matija Bećirović and Radmila Balaban Đurević and Zoran Radojičić and Nataša Milić},
journal = {Diagnostics (Basel, Switzerland)},
year = {2026},
month = oct,
doi = {10.3390/diagnostics16193236},
url = {https://europepmc.org/article/MED/42882390},
note = {CC BY},
}
RIS
TY - JOUR
TI - Age-Specific Ultrasound Reference Data for the Laterolateral Rectal Diameter in Healthy Children.
AU - Aleksandra Pucar
AU - Sofija Cvejić
AU - Darko Laketić
AU - Dubravka Milutinović
AU - Luka Đjoković
AU - Teodora Pecarski
AU - Matija Bećirović
AU - Radmila Balaban Đurević
AU - Zoran Radojičić
AU - Nataša Milić
PY - 2026
DA - 2026/10/07
JO - Diagnostics (Basel, Switzerland)
DO - 10.3390/diagnostics16193236
UR - https://europepmc.org/article/MED/42882390
AB - Background: Transabdominal ultrasonographic measurement of rectal diameter is increasingly used as a non-invasive adjunct for assessing rectal distension and fecal loading in children. However, interpretation is limited by the lack of age-stratified reference data in pediatric populations without bowel dysfunction. This study aimed to characterize the distribution of the laterolateral (LL) rectal diameter across childhood and adolescence and provide preliminary age-stratified empirical reference percentiles. Methods: This single-center cross-sectional study included pediatric participants aged ≤18 years who underwent clinically indicated abdominal ultrasonography for reasons unrelated to bowel or anorectal disorders and fulfilled predefined eligibility criteria. Maximal LL rectal diameter was measured transabdominally using a standardized protocol. Empirical percentiles were calculated for four age groups (6-36, 37-72, 73-144, and 145-216 months), with precision assessed using non-parametric bootstrap resampling with 10,000 repetitions. Results: The cohort comprised 188 participants: 46, 43, 62, and 37 in the four age groups, respectively; 107 (56.9%) were boys. Overall LL rectal diameter was 3.55 ± 1.46 cm (median, 3.20 cm; IQR, 2.50-4.30 cm), ranging from 1.01 to 8.00 cm. The LL diameter differed significantly across age groups (p = 0.002), with mean values increasing from 3.02 cm in the youngest group to 3.96 cm in the oldest group. No significant sex-related difference was observed (p = 0.843). P5-P95 ranges were 1.60-4.90, 1.51-5.89, 2.20-6.59, and 2.27-7.00 cm, respectively. Bootstrap confidence intervals were wider for extreme percentiles, particularly in smaller age strata. Conclusions: LL rectal diameter shows substantial interindividual variability and a modest age-related increase during childhood. These findings provide preliminary age-stratified empirical reference data rather than diagnostic thresholds or definitive normative limits. Larger multicenter studies are needed for external validation and more precise estimation of extreme percentiles.
SN - 2075-4418
ER -