该病例大体取材及MRI提示典型脑膜瘤，只是菊形团样结构（7、8、9）不知如何解释，所以发上来请教一下！

未提供部位，大家多多见谅！

谢谢马老师！

This is a case of microcystic/lipidized meningioma, WHO grade I. The demarcation from brain tissue is sharp (photo 1) with focal calcification (photo 1), vague whorl formation (photos 5 and 6), and uniform cells without atypical features. Perivascular pseudorosettes (photos 7 and 8) are not diagnostic of ependymoma. They can be seen in various gliomas (astrocytomas and ependymomas) and meningiomas. If unsure, do PR and EMA immunostains to confirm it.

以下是引用wfbjwt在2009-9-29 17:52:00的发言：  这么好的菊形团，考虑室管膜瘤。

这也是我发图的主要原因！

还有高手意见没？？

 这么好的菊形团，考虑室管膜瘤。