DNAJB1 and pancreatic ductal adenocarcinoma: In addition, several researches have demonstrated that the DNAJB1–PRKACA gene fusion can also be found in the pancreatic and biliary intraductal oncocytic papillary neoplasm (IOPN), as well as in the intraductal papillary mucinous neoplasm (IPMN) of pancreas and pancreatic ductal adenocarcinoma.