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Cavum vergae

Dr Yuranga Weerakkody and Dr Frank Gaillard et al.

A cavum vergae is a normal variant of the septum pellucidum in which there is separation of the leaflets of the septum pellucidum with posterior extension to the splenium of the corpus callosum.

There are two potential spaces between the leaflets of the septum pellucidum in adults. The cavum septum pellucidum, which is anterior, is separated from the more posterior cavum vergae by the anterior columns of the fornix. During development, these spaces obliterate postero-anteriorly: the cavum vergae followed by the cavum septum pellucidum. Because of this ordered obliteration, a cavum septum pellucidum almost always accompanies a cavum vergae. However, exceptions have been noted, suggesting that the obliteration of the spaces may not always occur in the same sequence.

Differential diagnosis

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