Catala M, Poirier J
Service d'Histologie, Embryologie et Cytogénétique et URA CNRS 2115, Groupe Hospitalier Pitié-Salpêtrière, Paris.
Rev Neurol (Paris). 1998 Jul;154(6-7):489-501.
Arachnoid cysts form a cavity containing a cerebrospinal-like fluid, the wall of which is composed of arachnoidal cells. Other types of intracranial cysts have been described, they differ from arachnoid cysts by the histological characteristics of their wall. To analyze homogeneous series, it is thus necessary to differentiate arachnoid cysts from the other types of cysts. Several localizations of these lesions have been described: the most frequent being the temporo-sylvian area. Arachnoid cysts are considered as resulting from congenital malformations that can change during postnatal life. They can no longer be considered as resulting from cerebral atrophy. This arachnoid malformation could be the primary event or be explained by an impairment of the cerebrospinal fluid drainage generated by venous agenesis. Several mechanisms could account for the inflation of these cysts: secretion by the cells forming the cyst walls, unidirectional valve, liquid movements secondary to pulsations of the veins.
蛛网膜囊肿形成一个包含脑脊液样液体的腔隙，其壁由蛛网膜细胞组成。已经描述了其他类型的颅内囊肿，它们与蛛网膜囊肿的区别在于其壁的组织学特征。为了分析同质性系列，因此有必要将蛛网膜囊肿与其他类型的囊肿区分开来。已经描述了这些病变的几种定位：最常见的是颞叶-外侧裂区。蛛网膜囊肿被认为是由先天性畸形引起的，这些畸形在出生后可能会发生变化。它们不再被认为是由脑萎缩引起的。这种蛛网膜畸形可能是原发性事件，或者可以用静脉发育不全导致的脑脊液引流障碍来解释。囊肿膨胀的几种机制可能包括：形成囊肿壁的细胞分泌、单向瓣膜、静脉搏动引起的液体流动。
