Figure 13
From: Diverse arachnoid cyst morphology indicates different pathophysiological origins
TEM of comparison arachnoid from a patient with Chiari type I malformation. On pial aspect (a) an attenuated single-layered epithelium covers a cell poor matrix; the cellular arrangement towards the dura (b) is in agreement with normal arachnoid with the superficial cells forming complicated extensions in a network manner (cf. Figure 3a).