Cavernous sinus syndrome produced by communication between the external carotid artery and cavernous sinus

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Abstract
✓ The authors present two cases of cavernous sinus syndrome with spontaneous onset secondary to arteriovenous malformations and review the cases reported previously. These malformations enlarge slowly and produce symptoms only in adult life. Diagnosis may be difficult when there is no associated bruit. Adequate evaluation necessitates selective angiography of both the internal and external carotid artery circulation and the vertebral circulation. Conservative treatment is recommended unless symptoms worsen or there is progressive loss of vision.