Fig. 2
From: Neuroendoscopic treatment of multiple intracranial arachnoid cysts: a case report
Intraoperative neuroendoscopic views. a Two cysts (c1 and c2) bulging into the right lateral ventricle. b Along the choroid plexus we find no trace of the foramen of Monro. c: Fenestration of the apical membrane in front of the midline (f1). d and e Anatomical landmarks seen after the endoscope is advanced into the first cyst (c1). f Fenestration of the apical membrane behind the midline (f2). g and h Two fenestrations of the basal cyst membrane behind the midline (f3 and f4). p = plexus choroideus; 1 = septal vein; 2 = thalamostriate vein; 3 = choroidal vein; A1 = the horizontal segment of the anterior cerebral artery; A2 = the ascending part of the anterior cerebral artery; AC = anterior communicating artery; ▲Indicates the optic chiasma