Postoperative Crohn's Disease Recurrence Risk and Optimal Biologic Timing After Temporary Diversion Following...

Area of Science:

• Gastroenterology
• Surgical Oncology
• Inflammatory Bowel Disease Research

Background:

• Postoperative recurrence of Crohn's disease (CD) following ileocolic resection is a significant clinical challenge.
• While primary anastomosis is common, intended temporary diversion (ITD) with ileostomy is used for high-risk patients to mitigate anastomotic complications.
• The impact of diversion on CD recurrence and the optimal timing of biologic prophylaxis remain areas of investigation.

Purpose of the Study:

• To assess the association between diversion status and postoperative CD recurrence risk after ileocolic resection.
• To evaluate the influence of biologic prophylaxis timing relative to ostomy takedown (OT) on recurrence in patients who underwent ITD.

Main Methods:

• Retrospective cohort study of 793 CD patients undergoing ileocolic resection (2009-2020).
• Patients were grouped by continuity status: primary anastomosis versus ITD.
• Propensity score-weighted matching and multivariable regression analyses were used to compare recurrence outcomes (radiographic, endoscopic, surgical, composite) between groups, adjusting for risk factors.

Main Results:

• After propensity score matching, ITD was not associated with increased radiographic or endoscopic recurrence but showed a higher risk of surgical recurrence (aHR, 1.61; 95% CI, 1.02-2.54).
• In the ITD group, 56.1% started biologics post-OT, 11.4% pre-OT, and 32.4% received no postoperative biologics.
• Biologic prophylaxis initiation before OT did not significantly reduce composite post-OT recurrence compared to starting after OT (52% vs 70.7%; P=.09).

Conclusions:

• Diversion following ileocolic resection should be performed when clinically indicated, as it is not consistently associated with increased postoperative recurrence risk.
• Patients requiring diversion are at high risk for recurrence, and initiating biologic therapy prior to stoma reversal may be a beneficial strategy.
• Further research is needed to optimize biologic prophylaxis timing in patients with ITD undergoing ileocolic resection for Crohn's disease.