Kawahara Y, Niiro M, Yokoyama S, Kuratsu J
Department of Neurosurgery, Faculty of Medicine, Kagoshima University, Sakuragaoka, Japan.
Neuroradiology. 2001 Jun;43(6):462-5. doi: 10.1007/s002340000524.
Our purpose was to verify the histological appearance of the dural tail accompanying meningiomas on MRI. We studied seven patients such a dural tale. We examined the point of attachment of the tumour and the adjacent dura mater histologically. In all patients, rich vascularity and dilated vessels were observed in the dura mater at the point of attachment of the tumour; tumour cells invaded the dura mater and vessels, packing the latter. In the adjacent dura mater, showing as a dural tail on MRI, there was tumour-cell invasion in only one patient. Vascular congestion around the vessels compacted by the tumour cells in the dura mater and dilated vessels were seen in all patients. We therefore suggest that the mechanism of the dural tail sign is as follows. First, tumour cells invade vessels and pack them at the point of tumour attachment. Then, vessel congestion is induced in the adjacent dura mater, as a result of which it enhances markedly, giving rise to the dural tail sign.
我们的目的是在磁共振成像（MRI）上验证脑膜瘤伴发的硬脑膜尾征的组织学表现。我们研究了7例有这种硬脑膜尾征的患者。我们从组织学上检查了肿瘤的附着点及相邻的硬脑膜。在所有患者中，在肿瘤附着点的硬脑膜处观察到丰富的血管和扩张的血管；肿瘤细胞侵入硬脑膜和血管，并填充血管。在MRI上表现为硬脑膜尾征的相邻硬脑膜中，仅1例患者存在肿瘤细胞浸润。在所有患者中均可见硬脑膜中被肿瘤细胞挤压的血管周围血管充血以及扩张的血管。因此，我们认为硬脑膜尾征的机制如下。首先，肿瘤细胞侵入血管并在肿瘤附着点填充血管。然后，相邻硬脑膜中诱发血管充血，结果硬脑膜明显强化，从而产生硬脑膜尾征。
