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.
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Buxton et al. (1998) studied this question.
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