Cerebral arteriovenous malformations associated with a straight sinus anomaly
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Updated: Aug 9, 2026

Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
T Minakawa1, R Tanaka, T Koike
1Department of Neurosurgery, Brain Research Institute, Niigata University, Japan.
Abstract:
Nine cerebral arteriovenous malformations (AVM) associated with straight sinus anomaly were demonstrated on angiograms. All 10 AVM (1 patient had two AVM) occupied deep cerebral structures: Seven were totally or partially located in the basal ganglia or the corpus callosum, and 3 were in the medial occipital or temporal lobe. In 6 patients, almost no filling of the straight sinus was observed, although the AVM were located deeply and the main drainage was via the vein of Galen. All 6 patients showed retrograde flow in the deep cerebral veins or venous drainage through a persistent facial sinus. The other 3 patients had duplication or septal formation of the straight sinus. Straight sinus anomaly is extremely rare in the normal population but seems not uncommon in patients with deep-seated AVM.
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