title: Abnormal flow in the cavernous sinus caused by an asymptomatic dural arteriovenous fistula of the contralateral transverse-sigmoid sinus.
abstract: A 53-year-old asymptomatic man underwent cranial MR imaging to rule out cerebrovascular disease. On T2-weighted axial images abnormal flow voids were detected at the right cavernous sinus, suggesting a dural carotid-cavernous fistula (CCF). On the MR angiogram, abnormal high intensity signals were observed at the right cavernous sinus and the left transverse-sigmoid (T-S) sinus, suggestive of coexisting right dural CCF and dural arteriovenous fistula (AVF) of the left T-S sinus. Selective cerebral angiography of the left external carotid artery revealed abnormal flow in the right cavernous sinus caused by the dural AVF of the left T-S sinus via the right inferior petrosal sinus due to occlusion of both the distal left sigmoid sinus and proximal right internal jugular vein.
authors.affiliation: Department of Diagnostic Radiology, Saitama Medical University, International Medical Center; Saitama, Japan - auchino@saitama-med.ac.jp.
authors.forename: A
authors.initials: A
authors.lastname: Uchino
authors.forename: R
authors.initials: R
authors.lastname: Egashira
authors.forename: K
authors.initials: K
authors.lastname: Nomiyama
authors.forename: Y
authors.initials: Y
authors.lastname: Takase
authors.forename: T
authors.initials: T
authors.lastname: Mineta
authors.forename: S
authors.initials: S
authors.lastname: Kudo