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Additional value of upper GI tract endoscopy in the diagnostic assessment of childhood IBD
Thalia Z Hummel1, Fiebo J W ten Kate, Johannes B Reitsma
1Department of Pediatric Gastroenterology, Academic Medical Center, Amsterdam, The Netherlands. T.Z.Hummel@amc.nl
Insights
Upper gastrointestinal tract (UGT) endoscopy is crucial for diagnosing pediatric inflammatory bowel disease (IBD). Histopathological changes in the UGT can help differentiate Crohn disease (CD) from ulcerative colitis (UC) and non-IBD cases.
Area of Science:
- Pediatric Gastroenterology
- Histopathology
- Inflammatory Bowel Disease Diagnostics
Background:
- Distinguishing Crohn disease (CD) from ulcerative colitis (UC) is vital for pediatric inflammatory bowel disease (IBD) treatment.
- Upper gastrointestinal tract (UGT) endoscopy is increasingly used, but its diagnostic role in differentiating IBD subtypes requires clarification.
- Pathological changes in the UGT can occur in both CD and UC, complicating diagnosis.
Purpose of the Study:
- To evaluate the diagnostic utility of UGT involvement in children with suspected IBD.
- To identify specific histopathological features in the UGT mucosa that distinguish CD from UC and non-IBD.
- To assess the contribution of UGT endoscopy to the overall diagnostic accuracy of pediatric IBD.
Main Methods:
- Reassessment of endoscopic biopsies (colon, ileum, duodenum, stomach, esophagus) from children with suspected IBD by a blinded pathologist.
- Comparison of UGT histological findings with diagnoses derived from ileocolonic biopsies and final clinical diagnoses.
- Statistical analysis to determine the specificity and predictive value of UGT histopathological findings.
Main Results:
- In 11% of pediatric CD cases, diagnosis relied solely on UGT granulomatous inflammation.
- Focal duodenal cryptitis and focally enhanced gastritis were significantly more prevalent in pediatric CD patients compared to UC and non-IBD groups.
- UGT findings demonstrated high specificity (99%) and positive predictive value (93% for focal cryptitis; 87.1% and 78.6% for gastritis).
Conclusions:
- Ileocolonic biopsies alone are insufficient for accurate CD or UC diagnosis in children.
- UGT endoscopy and subsequent histopathological analysis are essential components in the diagnostic workup of pediatric IBD.
- Incorporating UGT assessment improves the diagnostic accuracy for differentiating pediatric IBD subtypes.
Objectives:
For the choice of treatment in children with inflammatory bowel disease (IBD), it is important to make a distinction between Crohn disease (CD) and ulcerative colitis (UC). To look for pathognomonic features of CD, upper gastrointestinal tract (UGT) endoscopy has become part of the routine evaluation of children with suspected IBD; however, pathological changes can also be found in the UGT in patients with UC. The aims of the present study were to establish the role of UGT involvement in the diagnostic assessment of suspected IBD in children and to detect histopathological changes in the UGT mucosa, which can distinguish CD from non-CD (UC and non-IBD).
Methods:
Biopsies (colon, ileum, duodenum, stomach, esophagus) from children suspected of having IBD who underwent endoscopy between 2003 and 2008 were reassessed by a blinded, expert pathologist. The histological findings of the UGT were compared with the diagnosis based on ileocolonic biopsies and the final diagnosis.
Results:
In 11% of the children with CD, the diagnosis was based solely on the finding of granulomatous inflammation in the UGT. Focal cryptitis of the duodenum and focally enhanced gastritis were found significantly more frequently in children with CD compared with children with UC and non-IBD, with a specificity and positive predictive value of 99% and 93% and 87.1% and 78.6%, respectively.
Conclusions:
Histology on ileocolonic biopsies alone is insufficient for a correct diagnosis of CD or UC in children. UGT endoscopy should, therefore, be performed in the diagnostic assessment of all children suspected of having IBD.
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