Upper GI involvement and long-term CD outcomes

What is known

• Adult upper GI involvement, along with young age, penetrating disease, smoking and prior resection, has been associated with higher risk of early postoperative recurrence and poorer outcomes. ¹
• The upper GI phenotype has been linked to early surgery and further hospitalization, and jejunal/proximal involvement to worse long-term prognosis in referenced cohorts. ²
• A pediatric registry found upper GI involvement more prevalent but reported no significant difference in disease outcomes with versus without upper GI tract involvement. ³
• A 1985 long-term cohort found the most favorable prognosis in localized ileal or segmental colonic disease, with greater morbidity for ileocolic location. ⁴

What is unknown / caveats

• Adult data link upper GI location to early surgery/postoperative recurrence, while a pediatric registry found no outcome difference by upper GI involvement
• Upper GI phenotype associated with poorer outcomes in some cohorts but described as a heterogeneous single phenotype in others
• No retrieved head-to-head study isolating upper GI vs ileocolonic disease with adjusted long-term endpoints
• Much supporting evidence is registry/retrospective or drawn from reference lists rather than primary comparative data
• Definitions of 'upper GI involvement' (esophagogastroduodenal vs proximal jejunal) vary across sources
• Whether upper GI involvement independently predicts worse long-term outcomes remains unresolved; adult and pediatric data diverge and no adjusted comparative analysis was retrieved.

References

1. Tan ZV, Kosana K, Savarino J, Croft N, Naik S, Kaplan J, Giles E. Histology at diagnostic gastroscopy predicts outcome after intestinal resection in pediatric Crohn's disease. J Gastroenterol Hepatol. 2020;35(12):2074-2079. PMID: 32343456.

2. Sainz E, Zabana Y, Miguel I, Fernández-Clotet A, Beltrán B, Núñez L, García MJ, Martín-Arranz MD, Iglesias E, Cañete F, Gutiérrez A, Piqueras M, Pérez-Martínez I, Bujanda L, Rodríguez-Lago I, Casanova MJ, Navarro P, Vicente R, Merino O, Algaba A, Rodríguez C, Huguet JM, Fernández-Bañares F, Domènech E, Esteve M, ENEIDA registry of GETECCU. Clinical features, therapeutic requirements and evolution of patients with Crohn's disease and upper gastrointestinal involvement (CROHNEX study). Aliment Pharmacol Ther. 2021;54(8):1041-1051. PMID: 34406676.

3. Kim ES, Kwon Y, Choe YH, Kim MJ. Upper gastrointestinal tract involvement is more prevalent in Korean patients with pediatric Crohn's disease than in European patients. Sci Rep. 2020;10(1):19032. PMID: 33149222.

4. Farmer RG, Whelan G, Fazio VW. Long-term follow-up of patients with Crohn's disease. Relationship between the clinical pattern and prognosis. Gastroenterology. 1985;88(6):1818-25. PMID: 3922845.

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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.