cavity of septum pellucidum
a slitlike, fluid-filled space of variable width between the left and right transparent septa, which occurs in fewer than 10% of human brains and may communicate with the third ventricle.
Synonym(s): cavum septum pellucidumTA, Duncan ventricle, fifth ventricle, pseudocele, pseudoventricle, sylvian ventricle, ventricle of Sylvius, ventriculus quintus, Vieussens ventricle, Wenzel ventricle
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