AF.114 A COMPARATIVE AUDIT OF TWO SURVEILLANCE STRATEGIES FOR THE CHARACTERIZATION OF POLYPOID AND NON-POLYPOID LESIONS IN ULCERATIVE COLITIS WITH OR WITHOUT POWERED ENDOSCOPY AND MUCOSAL PATTERN CLASSIFICATIONS. (September 2021) - Cassinotti, A.; Ardizzone, S.; Cortelezzi, C.C.; Parravicini, M.; Balzarini, M.; Fociani, P.; Maconi, G.; Nebuloni, M.; Sessa, F.; Segato, S.