Contrastive analysis of CT MRI findings and pathologic characteristics of solid pseudopapillary tumor of the pancreas        YAN Li-fen*，ZHANG Shui-xing, LIANG Chang-hong. *Department of Radiology，Guangdong General Hospital，Guangdong Academy of Mecial Science，Guangzhou 510080, China
Corresponding  author：LIANG Chang-hong，E-mail：dr_liang62@hotmail.com
Abstract    Objective    To evaluate the CT and MRI findings of solid pseudopapillary tumor (SPT) of the pancreas with pathologic correlation and to improve the ability for the preoperative diagnosis of the disease. Methods    Preoperative CT or MRI images of 21 cases of histopathologically proven SPT in the pancreas admitted between April 2004 and April 2011 in Guangdong General Hospital were reviewed retrospectively and correlated to their pathologic features. Results Eight cases occurred in the pancreatic head，3 in the body and 10 in the tail. The size of SPT ranged from 3.5 to 18.0 cm (mean 6.3 cm). Tumors contained similar proportion of solid and cystic components in 8 cases, mostly solid components in 9 cases and mostly cystic components in 4 cases. Four lesions appeared calcification and one appeared hemorrhage. Of the two malignant SPT，one appeared hepatic metastases, and the other appeared invasion to duodenum. All of the lesions appeared mild or middle peripheral heterogeneous enhancement on arterial phase and progressive fill-in during the portal venous and equilibrium phases. Conclusion    CT and MRI images can provide the information about pathologic characteristics of pancreatic SPT. Diagnostic rate can be increased when knowing well with the relationship between them.