OC.04.1 SURGERY IN HIGH-RISK PAEDIATRIC CROHN'S DISEASE TREATED WITH UP-FRONT ANTI-TNF AGENTS AND LONG-STANDING BIOLOGIC THERAPY. (March 2023) - Musto, F.; Distante, M.; Dei, Rossi E.; Calicchia, A.; Veraldi, S.; Tarani, F.; D'Arcangelo, G.; Aloi, M.