We describe a patient with unilateral proptosis and chemosis resulting from a dural arteriovenous malformation (AVM) of the superior sagittal sinus (SSS) fed mainly by branches of both external carotid arteries. The symptoms may have been caused by increased SSS pressure and disturbance of venous flow by the dural AVM.
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Kurosu et al. (1998) studied this question.
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