# Examination of the Diameter of the Rectum and the Thickness of the Anterior Wall of the Rectum by Ultrasound in Children With Chronic Constipation and Abdominal Pain in the Age Range of 2–18 Years

## TL;DR

This study uses ultrasound to compare rectal measurements in children with chronic constipation and those without, finding differences in rectal diameter and thickness.

## Contribution

The study introduces ultrasound as a useful diagnostic tool for assessing rectal anatomy in children with constipation.

## Key findings

- Children with constipation had a larger rectal diameter compared to the control group.
- The thickness of the rectal anterior wall was lower in children with constipation.
- Rectal diameter was significantly related to the duration of constipation.

## Abstract

Abdominal pain is one of the most common complaints to the pediatric clinic and can be challenging for the physician. Among children who present with abdominal pain, constipation is one of the main causes of abdominal pain, and its incidence in childhood is estimated at 1%–30%.

Hundrerd children with chronic constipation, defined according to the Rome IV constipation criteria, who were referred to Sabzevar Children's Clinic, were included in the study. Hundred people in the control group were selected from children without constipation who underwent abdominal ultrasound due to abdominal pain. Consent was obtained from the children's parents, and the child's consent was also obtained for ultrasound. Rectal diameter and rectal anterior wall thickness were measured by an experienced radiologist.

The results determined that the diameter of the rectum measured by ultrasound in children with constipation is greater than in the control group. Also, the thickness of the rectum was lower in children with constipation compared to the control group. It was found that there was no significant relationship between gender and constipation in children. There was a significant relationship between constipation in children and their body mass index (BMI) and age. The results of the study showed that there was no significant relationship between history of urinary tract infection and constipation and socioeconomic status in children. There was a significant relationship between the diameter of the rectum and the duration of constipation.

Ultrasound can be useful in diagnosing children with constipation in whom it is difficult to take a history and physical examination.