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Pathology of chronic inflammatory bowel disease in children
1Department of Histopathology, Medical College of St Bartholomew's Hospital, West Smithfield, London, UK.
Insights
Chronic inflammatory bowel disease (IBD) includes various colonic conditions beyond ulcerative colitis and Crohn's disease. Accurate pediatric IBD diagnosis requires integrating clinical, radiological, and histological findings.
Area of Science:
- Gastroenterology
- Pathology
- Pediatric Medicine
Background:
- Chronic inflammatory bowel disease (IBD) encompasses more than just ulcerative colitis and Crohn's disease.
- Pediatric IBD includes indeterminate colitis, microscopic colitis, allergic colitis, and Behçet's enterocolitis.
- Histological overlap complicates IBD classification.
Purpose of the Study:
- To detail the morphological features of ulcerative colitis and Crohn's disease.
- To emphasize diagnosis via mucosal biopsy in pediatric IBD.
- To discuss differential diagnoses for pediatric colitis.
Main Methods:
- Review of morphological appearances in ulcerative colitis and Crohn's disease.
- Emphasis on diagnostic criteria for mucosal biopsies.
- Integration of clinical and radiological data with histopathology.
Main Results:
- Detailed description of histological findings for ulcerative colitis and Crohn's disease.
- Highlighting the importance of biopsy material selection and preparation.
- Discussion of diagnostic challenges due to histological overlap.
Conclusions:
- Accurate pediatric IBD diagnosis relies on a multidisciplinary approach.
- Clinical and radiological input is crucial for interpreting biopsy findings.
- Understanding morphological variations aids in differentiating IBD types.
Abstract:
The term chronic inflammatory bowel disease is usually applied to the idiopathic varieties ulcerative colitis and Crohn's disease but actually encompasses a wide range of colonic inflammatory conditions, which in children includes indeterminate colitis, microscopic colitis, allergic colitis and Behçet's enterocolitis. The pathologist's opinion is considered the final arbiter in the diagnosis of inflammatory bowel disease but classification may be hampered by the considerable histological overlap between the various types of colitis. Accurate diagnosis, particularly in biopsy specimens, thus depends on clinical and radiological input as well as on appropriately selected and adequately prepared material. This chapter discusses in detail the morphological appearances of ulcerative colitis and Crohn's disease with particular emphasis on diagnosis by mucosal biopsy and differential diagnosis in the paediatric age group. The recent demonstration of ulceration-associated cell lineage and trefoil peptide expression in inflammatory bowel disease is also discussed.