Some observations on the septum pellucidum.

The thin, vertically placed partition consisting of two laminae separated by a narrow chink constitutes the cavity of the septum pellucidum, known from the time of Sylvius. Traumatic lesions in boxers, rare congenital expanding cysts causing hydrocephalus, and a number of septo-optic dysplasias give clinical significance to the septum and its related cavum. (c) 2008 S. Karger AG, Basel