“…The etiology of IPMNs is not so clear, however, a previous history of diabetes, especially with insulin use, smoking, and a family history of pancreatic ductal adenocarcinoma are regarded as risk factors (10,19). Interestingly, the rate of extrapancreatic malignant tumors (colonic, gastric, bile duct, breast and prostate carcinoma) is reported to be higher in patients with IPMN than in those with pancreatic ductal adenocarcinoma (PDAC) (11,12,(20)(21)(22)(23)(24).…”