Schroeder H W, Gaab M R
Department of Neurosurgery, Ernst Moritz Arndt University, Greifswald, Germany.
Neurosurgery. 1997 Jan;40(1):198-200. doi: 10.1097/00006123-199701000-00045.
There are several theories regarding the genesis of arachnoid cysts. However, controversy continues over what mechanisms are involved in the formation of the cysts.
A 6-year-old female patient presented with precocious puberty. The results of a neurological examination were unremarkable. Magnetic resonance imaging revealed a large suprasellar prepontine arachnoid cyst.
An endoscopic ventriculocystostomy via a right frontal burr hole was performed. During inspection of the cyst, we clearly observed a slit-valve mechanism that was obviously responsible for the formation and enlargement of the cyst. The valve was formed by an arachnoid membrane surrounding the basilar artery. Synchronous with pulsation, the valve opened and closed rapidly.
A slit-valve mechanism seems to be at least one factor of the genesis of suprasellar prepontine arachnoid cysts.
关于蛛网膜囊肿的成因有多种理论。然而，囊肿形成涉及何种机制仍存在争议。
一名6岁女性患者出现性早熟。神经系统检查结果无异常。磁共振成像显示鞍上脑桥前有一个大的蛛网膜囊肿。
通过右侧额部钻孔进行了内镜下脑室囊肿造瘘术。在检查囊肿时，我们清楚地观察到一种裂隙瓣膜机制，该机制显然是囊肿形成和扩大的原因。瓣膜由围绕基底动脉的蛛网膜膜形成。与脉搏同步，瓣膜快速开闭。
裂隙瓣膜机制似乎至少是鞍上脑桥前蛛网膜囊肿成因的一个因素。
