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Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System: Brain: Cavum Septi Pellucidi Title

Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System: Brain

Cavum Septi Pellucidi

Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD

Peer Review Status: Internally Peer Reviewed

The septum pellucidum normally has a cavity of 1 to 2mm in width. When this cavity is larger, it is called cavum septi pellucidi or fifth ventricle. The term fifth ventricle is a misnomer because unlike ventricular cavities it does not contain cerebrospinal fluid nor is it lined by ependyma. The incidence of cavum septi pellucidi was 20.3% in 1032 brains studied.

The cavurn septi pellucidi varies from 2 to 95% depending to author; it is more prevalent in the young (infants) than older adults. The extreme differences in the reported frequency is highly suspect.

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Dandy, W.E. (1931) Congenital cerebral cysts of the cavum septi pellucidi (fifth ventricle) and cavum vergae (sixth ventricle). Arch. Neurol. Psychiatry 25:44-66.

Lang, J. (1983) Clinical Anatomy of the Head. Neurocraniurn, Orbit, Craniocervical Regions. Springer Verlag, Berlin, Heidelberg. New York.

Mori, K. (1985) Anomalies of the Central Nervous System. Neurology and Neurosurgery. Thieme-Stratton, Inc., New York.

Schwidde, J.T. (1952) Incidence of cavum septi pellucidi and cavum vergae in 1032 human brains. Arch. Neurol. Psychiatry 67:625-632.

Thompson, I. M. (1932) On the cavum septi pellucidi. J. Anat. 67:59-77.

Thompson, I. M. (1932) On certain abnormal conditions of the septum pellucidum. Univ. Calif. Pubs., Anat. 1(3):21-54.

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