Cavum vergae

A.Prof Frank Gaillard et al.

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

The cavum vergae is the posterior extension of the cavum septum pellucidum, posterior to the anterior columns of the fornix, lying anterior to the splenium of the corpus callosum, but it may exist independently 1-3

The cavum vergae has important immediate anatomical relations 3:

The septa of the cavum septum pellucidum at vergae begin to fuse from posterior to anterior from approximately 24 weeks gestation. By term, the cavum vergae is closed in 97% of babies, whereas the cavum septum pellucidum persists in most at this stage4. Cavum septum pellucidum closure to form a single septum pellucidum occurs by 6 months of age in 85% of cases but may persist to adulthood in 15%3.  Because of this ordered obliteration, a cavum septum pellucidum almost always accompanies a cavum vergae 1-2.

Anatomy: Brain
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Article information

rID: 1067
Section: Anatomy
Synonyms or Alternate Spellings:
  • 6th ventricle
  • Sixth ventricle

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Cases and figures

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    Figure 1: lateral view
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    Case 1: CSP and CV (MRI)
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    Figure 2: anterior view
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    Case 2: CV and CSP (CT)
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    Case 3: CV and CSP
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    Case 4: CSP and CV (multiplanar CT)
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    Case 5: with cerebellar haemorrhage
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    Case 6: with coloid cyst
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    Case 7: CSP and CV (annotated CT)
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    Case 8
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