表皮样囊肿的磁共振成像
MR imaging of epidermoid cysts.
作者信息
Tampieri D, Melanson D, Ethier R
机构信息
Department of Radiology, Montreal Neurological Hospital, Quebec, Canada.
出版信息
AJNR Am J Neuroradiol. 1989 Mar-Apr;10(2):351-6.
Nine patients with epidermoid cysts, five of them pathologically proved, were evaluated with MR imaging. Six patients also had CT. The cases were reviewed to evaluate the MR appearance of epidermoid cysts and to compare the MR findings with those of CT. The epidermoid cysts demonstrated low-signal intensity on T1-weighted MR images and hyperintensity on T2-weighted images. In five cases the cysts appeared heterogeneously iso- to hyperintense on the intermediate echo, and were surrounded by a thin rim of high signal intensity, which we believe was caused by encased CSF. The CT scans showed the cysts as low-density, well-demarcated lesions that do not enhance after infusion with contrast material. We conclude that MR is superior to CT in the evaluation of epidermoid cysts and is particularly useful in surgical planning.
对9例表皮样囊肿患者进行了磁共振成像（MR）评估，其中5例经病理证实。6例患者还进行了CT检查。回顾这些病例以评估表皮样囊肿的MR表现，并将MR检查结果与CT检查结果进行比较。表皮样囊肿在T1加权MR图像上表现为低信号强度，在T2加权图像上表现为高信号强度。5例病例中，囊肿在中等回波上表现为不均匀等信号至高信号，并被一薄层高信号强度包绕，我们认为这是由包裹的脑脊液所致。CT扫描显示囊肿为低密度、边界清晰的病变，注入对比剂后不强化。我们得出结论，在评估表皮样囊肿方面，MR优于CT，尤其在手术规划中很有用。
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