a new evaluation of pancreatic function after pancreatoduodenectomy using secretin magnetic resonance cholangiopancreatography background the remnant pancreatic function after pancreatoduodenectomy influences greatly postoperative quality of life however it has been difficult to evaluate the exocrine remnant pancreatic function postoperatively the aim of this study was to assess the usefulness of secretinstimulated magnetic resonance cholangiopancreatography secretin mrcp in evaluating the remnant pancreatic function and ascertaining the anastomotic patency after pancreatoduodenectomymethods thirtyfour patients who underwent pancreatoduodenectomy were evaluated with secretin mrcp the results of mrcp were determined by the amount of exocrine pancreatic secretion and were graded as follows grade i poor secretion grade ii moderate secretion and grade iii good secretionresults secretin mrcp could visualize the pancreatic secretion dynamically mrcp grades were grade i in 11 patients grade ii in 12 and grade iii in 11 there was a significant correlation between mrcp grade and glucose tolerance we confirmed visually the patency of the anastomotic site in 24 patients 71 mrcp grades correlated significantly with clinical symptomsconclusion our results demonstrated secretin mrcp was feasible for evaluating the remnant pancreatic function after pancreatoduodenectomy