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Duodenal Bulb Histology in Paediatric Celiac Disease: A Case-Control Study
Erin Boschee1, Atilano Lacson2, Justine Turner3
1Division of Pediatric Hospital Medicine, Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada.
Journal of the Canadian Association of Gastroenterology
|September 9, 2020
Summary
Duodenal bulb biopsies are crucial for diagnosing pediatric celiac disease (CD), even when distal duodenum samples appear normal. Separate sample submission aids accurate interpretation of these critical celiac disease findings.
Area of Science:
- Gastroenterology
- Pediatric Pathology
- Celiac Disease Diagnosis
Background:
- Optimal duodenal biopsy techniques for celiac disease (CD) diagnosis remain debated.
- The diagnostic reliability of duodenal bulb biopsies is questioned due to potential architectural mimicry.
- Previous studies suggest CD histopathological lesions can be confined to the duodenal bulb.
Purpose of the Study:
- To compare duodenal and duodenal bulb histology in pediatric patients with CD.
- To evaluate the significance of duodenal bulb biopsies in diagnosing celiac disease in children.
- To compare findings in celiac patients with nonceliac controls.
Main Methods:
- Retrospective analysis of duodenal and duodenal bulb histology.
- Inclusion of pediatric patients diagnosed with CD and nonceliac controls.
- Histopathological assessment using the modified Marsh classification.
Main Results:
- 93% of pediatric celiac disease patients showed CD-consistent histopathology in the duodenal bulb.
- A significant difference in modified Marsh classification between the duodenum and bulb was observed in 15.8% of celiac patients.
- Five celiac patients (8.8%) had Marsh 3 in the bulb and Marsh 0 in the distal duodenum; controls had no villous atrophy at either site.
Conclusions:
- Duodenal bulb biopsies are essential for diagnosing pediatric celiac disease.
- Submitting duodenal bulb samples separately from distal duodenal samples is recommended for accurate interpretation.
- Villous blunting and intraepithelial lymphocytosis are uncommon in pediatric nonceliac gastrointestinal disorders.
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