Diagnostic value of 3.0T MR for cystic neoplasms of pancreas

Objective:To investigate the diagnostic value of 3.0T MRI for cystic neoplasms of pancreas.Methods:The data of 30 patients with cystic neoplasms of pancreas were analyzed retrospectively and their imaging features were summarized.Results:①There were 15 cases of mucinous cystadenoma,13 at the body or at the tail of pancreas;they were relatively large,the average diameter was 85.5mm.There were seven cases of monosaccular or multisaccular lesions each.The monosacullar lesion had thin wall with less than 1.5mm,the multisaccular lesion had thick wall with more than 3.0mm.The cystic wall enhanced persistently.There was malignant change in 3 cases,they displayed marked enhancement of mural nodule or irregular thickening of the septa.②There were nine cases of serous cystadenoma,seven in the head of pancreas,the average diameter was 45.0mm;five of them were microsaccular type,3 of the five showed typical radiating fibrous septation;2 of them were macrosaccular type with internal net-like appearance.On T2WI there was hypointense septation,with persistant slight enhancement.③There were three cases of intraductal papilloma,the patients were elderly people.Two of them were main-duct type,showing dilatation of the main duct with persistant enhancement of the mural nodule.One of them was located at side branch of main duct,appeared as a cystic lesion communicating with the duct and without mural nodule.④There were two cases of solid pseudopapillary tumor(PSTP),bleeding was observed in both cases.There was one case of carcinoma of pancreas with cystic change,which was difficult to diagnose before operation.In total there were 30 cases of cystic tumor of pancreas,they were cystic or cystic-solid.11 case located at the head of pancreas,9 at the body and 10 at the tail of pancreas.Conclusion:3.0T MRI can very well display the cystic component of cystic-solid tumor of pancreas,and display cystic wall,septation and dynamic change of enhancement of the solid part.Integrating these characterictics and clinical manifestation,accurate diagnosis of certain cases of neoplasms can be made.