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为了探讨MRI对颅内表皮样囊肿的诊断价值,观察了20例经手术和病理证实的颅内先天性表皮样囊肿的MRI表现,其中12例有CT对照。T1加权像(T1WI)18例呈低信号,其信号强度介于脑脊液和脑皮质之间,另2例呈明显高信号。T2加权像(T2WI)均呈高信号,但普遍有信号不均匀现象。12例有CT者均呈低密度。颅内先天性表皮样囊肿好发于桥脑小脑角,有在中线生长的趋势,并常沿脑裂隙及脑池生长。MRI显示病变范围优于CT,但对钙化的显示CT优于MRI。结果提示:MRI对颅内表皮样囊肿能作出定性诊断。
In order to investigate the diagnostic value of MRI for intracranial epidermoid cysts, MRI findings of 20 cases of surgically and pathologically confirmed intracranial congenital epidermoid cysts were observed. Twelve of them had CT contrast. T1 weighted images (T1WI) 18 cases showed low signal intensity between the cerebrospinal fluid and cerebral cortex, the other two cases showed a significant high signal. T2-weighted images (T2WI) showed high signal, but the signal is generally uneven phenomenon. Twelve cases of CT showed low density. Congenital intracranial epidermoid cysts occur in the pons cerebellar angle, there is a trend of growth in the midline, and often along the brain fissures and brain pool growth. MRI showed lesions better than CT, but calcification showed CT better than MRI. The results suggest that: MRI can make a qualitative diagnosis of intracranial epidermoid cysts.