Early anti-TNF vs azathioprine after ileocolic resection

What is known

• Savarino three-arm RCT: endoscopic recurrence over 2 years of follow-up 6.3% adalimumab vs 64.7% azathioprine vs 83.3% mesalazine. ^1–3
• A POCER sub-analysis showed 6-month endoscopic recurrence higher with thiopurine (45%) than adalimumab (21%). ²
• Two network meta-analyses ranked anti-TNF monotherapy as most effective, significantly above thiopurine for preventing endoscopic and clinical recurrence. ²
• ECCO recommends drug prophylaxis best started within 2 weeks of surgery, though optimal timing remains undetermined. ¹

What is unknown / caveats

• A Middle Eastern cohort found no significant association between either biologics or azathioprine and prevention of endoscopic recurrence in moderate-high-risk patients
• The 2-week start window is a guideline recommendation, not the variable tested in the head-to-head trials. Timing was not isolated
• Superiority data come largely from a small RCT (n=51) and network meta-analyses, not a large timing-stratified trial
• Optimal timing and duration of anti-TNF prophylaxis after surgery remain undetermined by controlled data.

References

1. Vuitton L, Koch S, Peyrin-Biroulet L. Preventing postoperative recurrence in Crohn's disease: what does the future hold?. Drugs. 2013;73(16):1749-59. PMID: 24132799.

2. Yerushalmy-Feler A, Assa A. Pharmacological Prevention and Management of Postoperative Relapse in Pediatric Crohn's Disease. Paediatr Drugs. 2019;21(6):451-460. PMID: 31628665.

3. Thienpont C, Van Assche G. Endoscopic and medical management of fibrostenotic Crohn's disease. Dig Dis. 2014;32 Suppl 1:35-8. PMID: 25531351.

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