Scintigraphic evaluation of colonic transit in children with constipation using ⁶⁷Ga-citrate

Area of Science:

• Pediatric Gastroenterology
• Nuclear Medicine
• Radiology

Background:

• Chronic constipation is a common pediatric issue with diverse etiologies.
• Accurate assessment of colonic transit is crucial for effective management.
• Understanding transit patterns aids in tailoring therapeutic strategies.

Purpose of the Study:

• To evaluate colonic transit time in children and teenagers diagnosed with chronic constipation.
• To correlate colonic transit patterns with specific etiologies of constipation.
• To assess the utility of scintigraphy in guiding treatment for pediatric chronic constipation.

Main Methods:

• Twenty pediatric patients (1.5–16 years) with chronic constipation underwent colonic transit scintigraphy.
• A radiotracer (⁶⁷Ga-citrate) was administered orally, with abdominal images acquired at 1, 6, 24, 48, and 72 hours.
• Images were analyzed to classify transit as normal, diffuse slow, right slow, or left slow; dosimetry was also performed.

Main Results:

• Slow colonic transit was identified in various forms (diffuse, right, left) across different etiologies.
• Diffuse slow transit responded well to clinical treatment, particularly in idiopathic constipation.
• Right slow transit cases often benefited from surgical intervention (appendicostomy), and left slow transit was common in congenital megacolon.

Conclusions:

• Colonic transit scintigraphy is a simple, safe, and noninvasive method for assessing pediatric chronic constipation.
• The functional information obtained aids in therapeutic decision-making for children and adolescents.
• This technique provides valuable insights into the pathophysiology of constipation, guiding targeted interventions.