CT and MRI Diagnosis of Rare Cystic Disease of the Pancreas / 实用放射学杂志

ABSTRACT

Objective To investigate CT and MRI findings of rare cystic disease of the pancreas.Methods Elven cases with rare cystic disease of the pancreas underwent plain and contrast-enhanced CT and MR imaging before operation were reviewed.The clinical presentations and imaging findings were analysed.Among eleven cases,four were epidermoid,four were lymphepithelial cyst and three were lymphangioma.Results (1) Epidermoids located in the tail of the pancreas with smooth wall,the density of parenchyma of the lesons was the same as spleen at CT plain scan.On contrast-enhanced CT and MRI,the parenchyma of the lesions showed the same enhanced pattern with spleen.(2)Lymphepithelial cysts often occurred in olderly men.The lesions appeared as multilocular masses with definite border,isodensity at CT plain scan,and mixed iso-hyperintensity on both T_1WI and T_2WI images.After injection of contrast medium,the wall and septum of the lesions were enhanced.(3)Lymphangiomas were multilocular cystic lesion in the body-tail of the pancreas,hypodense at CT plain scan,and long T_1 and T_2 signal intensity at MRI plain scan.The septum and wall of the lesions were slightly enhanced on contrast-enhanced images.The lesions were not communicated with the pancreatic duct but pancreatic ducts were compressed and slightly shifted.Conclusion CT and MRI findings of rare neoplastic cystic disease of the pancreas are of certain characteristics.