[Two cases of severe acute pancreatitis-CT scan was useful to the assessment]

We report two cases of severe acute pancreatitis; a 53-year-old man (Case 1) and a 60-year-old woman (Case 2). Case 1 was classified as "severe" according to the Ranson's criteria and he died of MOF on the 21st hospital day. Case 2 was classified as "moderate", but a large pancreatic abscess was observed by CT scan. She died of this abscess complicated with duodenal perforation on the 33rd hospital day. CT findings showed that this case was not "moderate" but "severe". Therefore, we believe that the findings of CT scan are an important factor for assessment of the severity of acute pancreatitis.