CT enterography vs ileocolonoscopy for subclinical inflammation

What is known

• Enterography evaluates disease beyond the proximal reach of the colonoscope and CD features within and outside the bowel wall that colonoscopy cannot see. ¹
• Even with a negative ileocolonoscopy, enterography detects ileal CD missed by endoscopy, and this is associated with worse future outcomes. ¹
• Guidelines treat cross-sectional imaging (CTE/MRE) and ultrasound as complementary to endoscopy, not a replacement, and note radiation exposure argues against CT for follow-up monitoring. ²

What is unknown / caveats

• No retrieved study is restricted to asymptomatic patients or targets subclinical mucosal inflammation as the endpoint
• CTE's key advantage is transmural/small-bowel disease beyond scope reach, not mucosal detection per se. The two modalities assess different compartments
• Much of the retrieved evidence concerns capsule endoscopy and MRE rather than CTE head-to-head with ileocolonoscopy
• The direct CTE-vs-ileocolonoscopy comparison for subclinical mucosal inflammation in asymptomatic patients is not established in the retrieved excerpts.

References

1. Stidham RW, Enchakalody B, Wang SC, Su GL, Ross B, Al-Hawary M, Wasnik AP. Artificial Intelligence for Quantifying Cumulative Small Bowel Disease Severity on CT-Enterography in Crohn's Disease. Am J Gastroenterol. 2024;119(9):1885-1893. PMID: 38661148.

2. Gomollón F, Dignass A, Annese V, Tilg H, Van Assche G, Lindsay JO, Peyrin-Biroulet L, Cullen GJ, Daperno M, Kucharzik T, Rieder F, Almer S, Armuzzi A, Harbord M, Langhorst J, Sans M, Chowers Y, Fiorino G, Juillerat P, Mantzaris GJ, Rizzello F, Vavricka S, Gionchetti P, ECCO. 3rd European Evidence-based Consensus on the Diagnosis and Management of Crohn's Disease 2016: Part 1: Diagnosis and Medical Management. J Crohns Colitis. 2017;11(1):3-25. PMID: 27660341.

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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.