IPMN progression free survival (iPFS) defined as duration from date of randomization to date of event (IPMN progression), pursuant to the international Kyoto guidelines and the European guidelines.
IPMN will be considered as having progressed if any one or more of the following features occur:
(i) increase in size of > 1 mm; (ii) development of any worrisome feature (growth rate ≥ 5 mm/ 2 years, main pancreatic duct dilatation from 5-9 mm, acute pancreatitis caused by IPMN, enhancing mural nodule < 5 mm, increased serum CA 19-9 ≥ 37 U/ml, and cyst diameter ≥ 3 cm); or development of any high-risk stigmata (positive cytology for malignancy, solid mass, tumor related jaundice, enhancing mural nodule ≥ 5 mm, and main pancreatic duct dilatation ≥ 10 mm).