Cysts Originating from a Defect in the Hemispheric Cleavage (Cavum Septi Pellucidi, Cavum Vergae, Cavum Veli Interpositi)

  • Akira Yokota
Part of the Principles of Pediatric Neurosurgery book series (PRINCPEDIATR)


Cavities formed in the interhemispheric cleavage (cavum septi pellucidi, cavum vergae, and cavum veli interpositi) develop as normal structures in the intrauterine period, and are usually developmentally obliterated during postnatal life. Remnants of these cavities are regarded as nonmalformative structures and have no clinical significance in the majority of cases. Abnormally expanded cavities that do not have free communication with the lateral ventricles or subarachnoid space are called cysts. The terms symptomatic cysts and pathological cava may be preferred for cavities that produce neurological symptoms by compressing the neighboring structures or cause hydrocephalus by obstructing the CSF pathways.1 Symptomatic or pathological cysts arising from the cava septi pellucidi, vergae, and veli interpositi are considered to be very rare.1


Corpus Callosum Lateral Ventricle Arch Neural Septum Pellucidum Cavum Septi Pellucidi 
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© Springer Science+Business Media New York 1993

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  • Akira Yokota

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