OC.09.6 PERFORATING CROHN'S DISEASE AND EXTENSIVE COLITIS AS RISK FACTORS FOR INCIDENT CANCER: A MULTICENTER NESTED CASE-CONTROL IG-IBD STUDY AT 6 YEARS. (25th March 2019) - Petruzziello, C.; Armuzzi, A.; Scribano, M.L.; Castiglione, F.; D'Incà, R.; Daperno, M.; Papi, C.; Vecchi, M.; Fries, W.; Riegler, G.; Alvisi, P.; Mocciaro, F.; et al.