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Partially Sequestered Fourth Ventricle: CT and MR Diagnosis of an Unusual Entity

Published online by Cambridge University Press:  18 September 2015

V.G. Wagle ,
D. Melanson  and
J.G. Villemure
V.G. Wagle*
Affiliation:
Department of Neurosurgical Education at Hartford Hospital, University of Connecticut Health Center, Hartford
D. Melanson
Affiliation:
Department of Neurosurgery and Neuroradiology, Montreal Neurological Hospital and Institute, McGill University, Montreal, Quebec, Canada
J.G. Villemure
Affiliation:
Department of Neurosurgery and Neuroradiology, Montreal Neurological Hospital and Institute, McGill University, Montreal, Quebec, Canada
*
Department of Neurosurgery, Hartford Hospital, Hartford, CT 06115-0729 U.S.A.
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Abstract:

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Encystment of the fourth ventricle, due to occlusion of the aqueduct as well as the foramina of Magendie and Luschka has been described previously. Partial sequestration such as that encountered in two cases described is a less common entity. In these two cases, the aqueduct of Sylvius was occluded, but the basal foramina (Magendie and Luschka) were patent. We discuss this partial sequestration or communicating hydrocephalus of the fourth ventricle on the basis of MR and CT scan findings. Although computed tomography following water soluble cisternography did diagnose the entity indirectly MRI proved to be a superior tool. It permitted direct visualization of the basal foramina noninvasively.

Type
Original Articles
Information
Canadian Journal of Neurological Sciences , Volume 16 , Issue 1 , February 1989 , pp. 84 - 87
Copyright
Copyright © Canadian Neurological Sciences Federation 1989

References

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