DOP77 Is durable remission achievable after ileocolic resection for Crohn’s disease ? Long-term results of a prospective multicentric cohort study of the GETAID Chirurgie

Abstract Background Most of the patients undergoing bowel resection for Crohn’s disease (CD) develop postoperative recurrence requiring medical treatment intensification or surgery. Is there a subgroup of patients for which surgery allows durable remission? Methods In this retrospective follow-up study, we collected data from 592 patients undergoing ileocolic resection for CD who were included from 2013 to 2015 in a prospective nation-wide cohort of the GETAID Chirurgie group. Patients with follow-up superior to 36 months were included. Primary outcome was durable remission, defined as the absence of endoscopic recurrence (Rutgeerts ≥i2) and/or absence of medical treatment intensification. Uni- and multivariate analyses of the predictive factors for durable remission were carried out. Results Among 268 included patients, 158 (59%) had a B2 stricturing phenotype, 92 (34%) had a B3 penetrating phenotype and 18 (7%) had a non-stricturing non-perforating phenotype (Montreal classification). One hundred and eighty-eight patients (70%) had a primary ileocolic resection. One hundred and sixty-seven patients (66%) had postoperative medical treatment to prevent postoperative recurrence (Table 1). After a median follow-up of 85 (36-104) months, 52 patients (19%) had a durable remission, among which 24 (46%) had no medical treatment and 28 (54%) maintained the same postoperative prophylactic treatment, including anti-TNF therapy in 15 patients (54%) (Table 2). Durable remission rate was significantly increased in B1 phenotype vs B2/B3 (n=7/18 ;39% vs n=45/250; 18%, p=0.030) and in primary ileocolic resection vs redo ileocolic resection (n=43/184 ; 23% vs n=9/80 ; 11%, p=0.023). In multivariate analysis, B1 phenotype was an independent predictive factor for durable remission (OR=3.59, IC95%[1.13-11.37], p=0.030) (Table 3). Conclusion These long-term data obtained from a nation-wide prospective cohort are in line with those of a randomised controlled trial (LIR!C) and show that durable remission is obtained in nearly 40% of CD patients with non-stricturing non-penetrating phenotype operated for CD refractory to medical treatment. This important result should be considered when medical treatment intensification versus surgery is discussed in these patients.