Abstract：Objective: To summarize the CT and MRI findings of pineal parenchymal tumors and to discuss the differential diagnosis of pineocytoma(PC), pineal parenchymal tumor of intermediate differentiation(PPTID) and pineoblastoma(PB). Methods: The CT and MRI findings of 7 cases of PC, 4 cases of PPTID and 7 cases of PB were reviewed retrospectively. All cases were proved by operation and pathology. The data were evaluated by statistical tests using SPSS 13.0. Results: Tumor margin（χ2＝10.275）, flow void（χ2＝10.929）, shape（χ2＝7.907） and maximum size（F＝4.766） were statistically significant among the three groups. Conclusion: Our data indicate that tumor margin, shape, maximum size and flow void are useful factors to differentiate PC and PB. However, PPTID and PB can not be differentiated on CT and MRI findings.
2009, Vol. 20 
