Falcine sinus and occipital encephalocele: a magnetic resonance venography study.

Abstract:

OBJECT:Occipital encephaloceles are relatively frequently encountered. Many investigators have addressed the embryogenesis of these formations, but the dural system has never before been studied. In this retrospective analysis the authors sought to gain a better understanding of the origins of these defects. METHODS:The charts and radiological examinations, especially the magnetic resonance venography studies, were reviewed in seven patients. In six patients the straight sinus was absent. Drainage of the galenic system took place through a sinus within the falx, also known as a falcine sinus. The tentorium was not seen in five patients. CONCLUSIONS:The combination of an absent straight sinus and dysplastic tentorium is no coincidence: both develop within the same mesenchyme in the mesencephalic flexure. Distortion of the mesenchyme by a neural tube defect, causing an occipital encephalocele, will lead not only to disorders of the tentorium but also of the straight sinus.

journal_name

J Neurosurg

journal_title

Journal of neurosurgery

authors

Bartels RH,Merx JL,van Overbeeke JJ

doi

10.3171/jns.1998.89.5.0738

subject

Has Abstract

pub_date

1998-11-01 00:00:00

pages

738-41

issue

5

eissn

0022-3085

issn

1933-0693

journal_volume

89

pub_type

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