Liliequist's membrane in minimally invasive endoscopic neurosurgery

Liliequist's membrane, an arachnoid condensation extending from the upper border of the dorsum sellae to the anterior edge of the mammillary bodies and formerly a relatively insignificant structure, has been found to be extremely important in the neuroendoscopic management of hydrocephalus. Failure to open this membrane can lead to the failure of third ventriculostomies. Clin. Anat. 11:187–190, 1998. © 1998 Wiley-Liss, Inc.