室管膜下瘤的磁共振成像表现
MR manifestations of subependymomas.
作者信息
Hoeffel C, Boukobza M, Polivka M, Lot G, Guichard J P, Lafitte F, Reizine D, Merland J J
机构信息
Department of Neuroradiology and Therapeutic Angiography, Hôpital Lariboisière, Paris, France.
出版信息
AJNR Am J Neuroradiol. 1995 Nov-Dec;16(10):2121-9.
PURPOSE
To provide a description of the MR and enhanced MR appearances of subependymomas.
METHODS
We reviewed the MR examinations of eight cases of pathologically proved subependymomas and correlated them with operative and pathologic reports, and also reviewed the previous published cases of subependymomas documented by MR. Gadopentetate dimeglumine-enhanced MR examination was performed in seven cases.
RESULTS
One patient presented with four subependymomas, two patients had subependymomas of the cervical spine, and the others were intraventricular with no transependymal extension. They were isointense to hypointense relative to normal white matter on T1-weighted images, heterogeneous in five cases. Minimal (n = 1) or no (n = 3) enhancement was noted in four cases, and moderate or marked enhancement was noted in three cases.
CONCLUSION
We conclude that even though there is no specific sign of subependymomas, when confronted with a complete intraventricular lesion or with a spinal lesion causing little or no edema which is minimally enhancing or nonenhancing, one must consider the diagnosis of subependymoma.
目的
描述室管膜下瘤的磁共振成像（MR）及增强MR表现。
方法
我们回顾了8例经病理证实的室管膜下瘤的MR检查结果，并将其与手术及病理报告进行关联，同时回顾了既往已发表的经MR记录的室管膜下瘤病例。7例患者进行了钆喷酸葡胺增强MR检查。
结果
1例患者有4个室管膜下瘤，2例患者的室管膜下瘤位于颈椎，其他患者的肿瘤位于脑室内，无经室管膜扩展。在T1加权图像上，它们相对于正常白质呈等信号或低信号，5例表现为不均匀信号。4例患者可见轻微（n = 1）或无（n = 3）强化，3例患者可见中度或明显强化。
结论
我们得出结论，尽管室管膜下瘤没有特异性征象，但当遇到完全位于脑室内的病变或导致轻微或无水肿且强化轻微或无强化的脊柱病变时，必须考虑室管膜下瘤的诊断。
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