Cavum vergae

Changed by Devendra Lokhande, 7 Sep 2018

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The cavum vergae (CV), along with the cavum septum pellucidum (CSP) is a persistence of the embryological fluid-filled space between the leaflets of the septum pellucidum and is a common anatomical variant. The CV is sometimes referred to as the 6th ventricle ³.

Gross anatomy

The CV is the posterior extension of the CSP, posterior to the anterior columns of the fornix, lying anterior to the splenium of the corpus callosum, but it may exist independently ^1-3.

Relations ³

anteriorly: cavum septum pellucidum
posteriorly: splenium of the corpus callosum
superiorly: body of the corpus callosum
inferiorly: transverse fornix

Development

The CV and CSP usually close in the 3rd to 6th ~~week~~ ~~in utero~~ ~~but~~month after birth⁴, but may persist in 30% of term infants and 15% of adults ³. During development, these spaces obliterate postero-anteriorly: the CV followed by the CSP. Because of this ordered obliteration, a CSP almost always accompanies a CV may not always occur in the same sequence ^1-2.

Differential diagnosis

Related pathology

cavum vergae cyst

-</ul><h4>Development</h4><p>The CV and CSP usually close in the 6th week <em>in utero</em> but may persist in 30% of term infants and 15% of adults <sup>3</sup>. During development, these spaces obliterate postero-anteriorly: the CV followed by the CSP. Because of this ordered obliteration, a CSP almost always accompanies a CV may not always occur in the same sequence <sup>1-2</sup>.</p><h4>Differential diagnosis</h4><ul>
+</ul><h4>Development</h4><p>The CV and CSP usually close in the 3rd to 6th month after birth<sup>4</sup>, but may persist in 30% of term infants and 15% of adults <sup>3</sup>. During development, these spaces obliterate postero-anteriorly: the CV followed by the CSP. Because of this ordered obliteration, a CSP almost always accompanies a CV may not always occur in the same sequence <sup>1-2</sup>.</p><h4>Differential diagnosis</h4><ul>

References changed:

4. Farruggia S & Babcock D. The Cavum Septi Pellucidi: Its Appearance and Incidence with Cranial Ultrasonography in Infancy. Radiology. 1981;139(1):147-50. <a href="https://doi.org/10.1148/radiology.139.1.7208915">doi:10.1148/radiology.139.1.7208915</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/7208915">Pubmed</a>

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