Endoscopy at 6 vs 12 months after ileal resection

What is known

• Ileocolonoscopy within the first year after surgery is currently recommended to assess endoscopic recurrence and adjust treatment. ^1,2
• Endoscopic recurrence precedes clinical recurrence and severe endoscopic recurrence predicts a poor long-term prognosis, providing the rationale for early surveillance. ^2,3
• A treat-to-target strategy stratified by endoscopic recurrence (De Cruz et al.) outperformed uniform postoperative treatment, but this evaluated surveillance-guided care, not a 6- versus 12-month interval. ⁴

What is unknown / caveats

• No retrieved study compares a 6-month versus 12-month surveillance interval
• Surgical (re-resection) recurrence as an endpoint of surveillance timing is not directly examined
• Excerpts describe a first-year window, not a specific optimal month
• The optimal timing within the first postoperative year and its downstream effect on re-resection is not resolved by the retrieved evidence.

References

1. Sokol H, Brot L, Stefanescu C, Auzolle C, Barnich N, Buisson A, Fumery M, Pariente B, Le Bourhis L, Treton X, Nancey S, Allez M, Seksik P, REMIND Study Group I. Prominence of ileal mucosa-associated microbiota to predict postoperative endoscopic recurrence in Crohn's disease. Gut. 2020;69(3):462-472. PMID: 31142586.

2. 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.

3. Shen B, Kochhar GS, Navaneethan U, Cross RK, Farraye FA, Iacucci M, Schwartz DA, Gonzalez-Lama Y, Schairer J, Kiran RP, Kotze PG, Kobayashi T, Bortlik M, Liu X, Levy AN, González Suárez B, Tang SJ, Coelho-Prabhu N, Lukas M, Bruining DH, El-Hachem S, Charles RJ, Chen Y, Sood A, Mao R, Loras C, Dulai PS, Picoraro JA, Chiorean M, Shergill A, Silverberg MS, Sandborn WJ, Bernstein CN. Endoscopic evaluation of surgically altered bowel in inflammatory bowel disease: a consensus guideline from the Global Interventional Inflammatory Bowel Disease Group. Lancet Gastroenterol Hepatol. 2021;6(6):482-497. PMID: 33872568.

4. Maguire LH, Alavi K, Sudan R, Wise PE, Kaiser AM, Bordeianou L. Surgical Considerations in the Treatment of Small Bowel Crohn's Disease. J Gastrointest Surg. 2017;21(2):398-411. PMID: 27966058.

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Draft, generated by the IBDology RAG and not yet clinician-reviewed. Answers are grounded in the retrieved literature listed above; a high faithfulness score means the answer matches its sources, not that the sources are correct.