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Updated: Jan 1, 2026
Murine Ileocolic Bowel Resection with Primary Anastomosis
Published on: October 29, 2014
The Predictive Value of Inflammation at Ileocecal Resection Margins for Postoperative Crohn's Recurrence: A Cohort
Karin A T G M Wasmann1, Jojanneke van Amesfoort1,2, Maurits L van Montfoort2
1Dept. of surgery, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Background:
Resections for Crohn's disease should be limited and only resect macroscopically affected bowel. However, recent studies suggest microscopic inflammation at resection margins as a predictor for postoperative recurrence. The clinical impact remains unclear, as non-uniform pathological criteria have been used. The aim of this study was to assess the predictive value of pathological characteristics at ileocecal resection margins for recurrence.
Methods:
Both resection margins of 106 consecutive patients undergoing ileocecal resection for Crohn's disease between 2002 and 2009 were revised and scored for active inflammation, myenteric plexitis, and granulomas. Pathological findings were correlated to recurrence, defined as recurrent disease activity demonstrated by endoscopy (modified Rutgeerts score ≥i2) requiring upscaling medical treatment, using multivariate analysis.
Results:
Active inflammation was found at the proximal and distal resection margin in 27% and 15% of patients, respectively, myenteric plexitis in 37% and 32%, respectively, and granulomas in 4% and 6%, respectively. In total, 47 out of 106 patients developed recurrence. Only active inflammation at the distal colonic resection margin was an independent significant predictor for recurrence (88% vs 43% vs 51% for distal, proximal, and no involved margins, respectively; P < 0.01).
Conclusion:
Active inflammation at the distal colonic resection margin after ileocecal resection identifies a patient group at high risk for postoperative recurrence both at the anastomotic site and the colon because it identifies undiagnosed L3 disease. These patients have a different and more aggressive natural history and require more intense medical treatment. Therefore, pathological evaluation of the distal resection margin should be implemented in daily practice.
Insights
Microscopic active inflammation at the distal colonic resection margin after Crohn's disease surgery predicts recurrence. This finding helps identify high-risk patients for more intensive medical treatment and guides surgical pathology practices.
Area of Science:
- Gastroenterology
- Surgical Pathology
- Inflammatory Bowel Disease Research
Background:
- Crohn's disease resections aim to remove only macroscopically affected bowel.
- Microscopic inflammation at resection margins may predict postoperative recurrence, but clinical impact is unclear due to varied pathological criteria.
Purpose of the Study:
- To assess the predictive value of pathological characteristics at ileocecal resection margins for Crohn's disease recurrence.
Main Methods:
- 106 patients undergoing ileocecal resection for Crohn's disease had resection margins revised and scored for inflammation, myenteric plexitis, and granulomas.
- Pathological findings were correlated with recurrence using multivariate analysis, defining recurrence as endoscopic evidence of disease activity requiring increased medical treatment.
Main Results:
- Active inflammation was present in 27% (proximal) and 15% (distal) margins; myenteric plexitis in 37% (proximal) and 32% (distal); granulomas in 4% (proximal) and 6% (distal).
- Active inflammation at the distal colonic resection margin independently predicted recurrence (88% recurrence with distal margin involvement vs. 43% proximal, 51% no involvement; P < 0.01).
Conclusions:
- Active inflammation at the distal colonic resection margin after ileocecal resection identifies patients at high risk for recurrence.
- This finding may indicate undiagnosed L3 disease and a more aggressive disease course, necessitating intensified medical treatment.
- Pathological evaluation of the distal resection margin should be integrated into routine practice for Crohn's disease management.
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