MRI and CT Diagnosis of Intrcranial Epidermoid Cyst / 医学研究杂志

ABSTRACT

Objective To analyze the features of intracranial epidermoid cyst on CT and MRI imaging.Methods 26 patients with intracranial epidermoid cysts proven pathologically were examined with pre-and post-contrst enhanced CT and MR imging,and 6 of 26 cases undergone CT plain scan.CT and MR imaging of 20cases were retrospectivelly reviewed.Results Among 26 cases,16 were located in the cisterns of cerebell opontine angle,7 in saddle area.2 inside of the skull;1in the brain essence.On CT,25 cases were homogeneous hypodense,one case was promiscuous high density,16 cases demonstrted inhomogeneous hypointensityimaging on T1WI,and inhomogenous hyperintensity on T2WI.4 cases display inhomogeneous signal.No contrast enhancement was noted except 2 cases with slightly periphery enhancement.One case brain organization receives invades,There was edema around tumor.17 cases demonstrated slightly inhomogeneous hyperintensity on FLAIR MR images,3 cases obviously advance.Conclusion The CT and MRI features of intracranial epidermoid cysts were certain characteristic,and MRI played an important role.as to uncharacteristic epidermoid cyst,there is still space for further research.