CT was found to be a reliable often specific and noninvasive method for detecting pancreatic diseases. In a study of pancreatic lesions 37 cases having satisfactory operative and histological proofs were analyz-ed by CT at PMC from Jan, 1986 to Oct 1987. The results were as following : 1. Male : famale is 26 : 11. 2. The incidence of pancreatic disease were as follows : 1) Pancreatic cancer : 21 cases (56%) a. Head : 12 cases b. Body : 4 cases c. Tail : 1 cases d. Body ＆ tail : 1 cases e. Uncinate process : 2 cases f. Entire pancreas : 1 cases 2) Acute pancreatitis : 6 cases (16%) 3) Chronic pancreatitis : 5 cases (14%) 3. The characteristic CT findings : 1) 100% of pancreatic head cancer showed focal mass or alteration of pancreatic head contour and biliary tree dilatation and 33% (7/12) fat line obliteration. 2) All of other pancreatic cancer except head appearede as focal mass or contour alteration and fat line obliteration. 3) Total 6 case of acute pancreatitis showed that 5 cases diffuse enlargement of pancreas 3 fluid collec-tion (2 cases: left anterior pararenal ＆posterior pararenal space and lesser sac 1 case : only pancreas body) and 1 case abscess formation. 4) Total 5 cases of chronic pancreatitis revealed diffuse enlargement 2 cases ＆ atrophy 1 case pancreatic ductal dilatation 3 cases calcification 2 cases and biliary tree dilatation with CBD tapering appearance 1 case. 5) All cases of pseudocysts were well marginated cystic lesions that located at head in 3 cases and tail 3 cases and 4 cases were well defined pure cystic masses but 1 case was well capsulated cyst with multiple internal septation.