Several pancreatic neoplastic cystic lesions, such as IPMN (intrapapilary mucinous neoplasia), cystic neuroendocrine tumors (NET) and mucinous neoplasms, present a carcinogenetic risk, though it is yet unknown if this risk is increased in patients with pancreatic steatosis (PS). The primary objective of the study is to determine de prevalence of pancreatic steatosis in pancreatic neoplastic cysts and if pancreatic steatosis is increased in those lesions that pose a carcinogenetic risk. The secondary objective is to evaluate the prevalence of pancreatic steatosis in pancreatic adenocarcinoma.