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Cavum septi pellucidi --> cavity of septum pellucidum

a slitlike, fluid-filled space of variable width between the left and right transparent septum, which occurs in less than 10% of human brains and may communicate with the third ventricle.

Synonym: cavum septi pellucidi, duncans ventricle, fifth ventricle, pseudocele, pseudoventricle, sylvian ventricle, ventricle of sylvius, ventriculus quintus, vieussens ventricle, wenzels ventricle.