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Presence of Granulomas in Mesenteric Lymph Nodes Is Associated with Postoperative Recurrence in Crohn's Disease

Yi Li1, Luca Stocchi, Xiuli Liu

  • 1*Department of Colorectal Surgery, †Department of Anatomic Pathology, and ‡Center for Inflammatory Bowel Diseases, Cleveland Clinic Foundation, Cleveland, Ohio.

Inflammatory Bowel Diseases
|July 29, 2015
PubMed
Abstract

Insights

Granulomas in mesenteric lymph nodes (MLN) predict Crohn's disease (CD) recurrence after surgery. Finding granulomas in MLN, but not the intestinal wall, indicates a higher risk of both endoscopic and surgical recurrence in CD patients.

Area of Science:

  • Gastroenterology
  • Surgical Pathology
  • Inflammatory Bowel Disease Research

Background:

  • The predictive value of granulomas in mesenteric lymph nodes (MLN) for postoperative Crohn's disease (CD) recurrence remains unclear.
  • Understanding this association can improve patient management and predict disease outcomes.

Purpose of the Study:

  • To evaluate the predictive significance of granulomas in MLN and intestinal wall for postoperative recurrence in Crohn's disease (CD) patients.
  • To determine if MLN granulomas are an independent risk factor for CD recurrence post-ileocolonic resection.

Main Methods:

  • Retrospective review of 194 Crohn's disease (CD) patients who underwent ileocolonic resection (2004-2012).
  • Analysis of surgical pathology reports for granuloma presence in MLN and intestinal wall.
  • Confirmation of MLN granulomas by expert pathologist review.
  • Statistical analysis including univariable, multivariable, and Cox regression models to identify risk factors for recurrence.

Main Results:

  • Granulomas were found in MLN in 11.9% and intestinal wall in 29.4% of patients.
  • MLN granulomas significantly correlated with increased risk of endoscopic (P=0.015) and surgical recurrence (P=0.035).
  • Intestinal wall granulomas showed no association with recurrence (endoscopic P=0.94; surgical P=0.56).
  • MLN granulomas independently predicted higher risk for endoscopic (HR=1.91) and surgical recurrence (HR=3.43).

Conclusions:

  • Presence of granulomas in mesenteric lymph nodes (MLN) is an independent risk factor for postoperative recurrence in Crohn's disease (CD).
  • Granulomas within the intestinal wall itself do not predict recurrence.
  • MLN granuloma status should be considered in assessing recurrence risk after ileocolonic resection for CD.

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