Cellobiose/mannitol sugar permeability test in children in relation to jejunal morphometry

Area of Science:

• Pediatric Gastroenterology
• Gastrointestinal Physiology
• Diagnostic Testing

Background:

• Assessing intestinal mucosal integrity is crucial in pediatric gastroenterology.
• Sugar permeability tests are used to evaluate mucosal damage, but their sensitivity for minor lesions is debated.
• The cellobiose/mannitol test is a non-invasive method to assess intestinal permeability.

Purpose of the Study:

• To evaluate the utility of the cellobiose/mannitol test in detecting varying degrees of jejunal mucosal damage in children.
• To correlate intestinal permeability results with jejunal morphometry in pediatric patients.
• To determine the sensitivity of the cellobiose/mannitol test for minor mucosal abnormalities.

Main Methods:

• A cohort of 200 pediatric patients underwent simultaneous cellobiose/mannitol testing and jejunal biopsy.
• Morphometric analysis of jejunal biopsy specimens was performed using a computerized image analysis system.
• Intestinal permeability was assessed by the cellobiose/mannitol ratio.

Main Results:

• Increased sugar permeability was observed in a high percentage of patients with subtotal (89%) and severe partial (80%) villous atrophy.
• Mild partial villous atrophy (67%) and normal histology (18%) showed varying degrees of permeability.
• No statistically significant correlation was found between the cellobiose/mannitol ratio and specific morphometric parameters (villous length, crypt length, villous/crypt ratio, intraepithelial lymphocytes density) after excluding severe mucosal damage.

Conclusions:

• The cellobiose/mannitol test is a valuable indicator of severe mucosal damage in the jejunum.
• The test has limitations in discriminating minor degrees of mucosal abnormalities.
• The cellobiose/mannitol test provides useful functional insights into jejunal mucosa, particularly in severe cases.