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Inferior Sagittal Sinus Varix: An Imaging Mimic of Pericallosal Artery Aneurysm
Paul Ryan1, Ronette G Tyndall2, Alexandre Boutet2
1From the Division of Neuroradiology (P.R., R.G.T., A.B., D.V., E.J.H.), Joint Department of Medical Imaging, Toronto Western Hospital, University Health Network and Department of Medical Imaging, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Division of Neurology, Department of Medicine (J.D.S.), Neurosurgery (H.A., D.V., E.J.H.), University Health Network, Toronto, Ontario, Canada. Paul.Ryan@uhn.ca.
Abstract:
Venous varices of the inferior sagittal sinus are rare benign entities. At our institution's Multidisciplinary Neurovascular Clinic, we recently received several referrals regarding "pericallosal artery aneurysms" which in fact represented venous outpouchings or varices of the inferior sagittal sinus. This case series highlights venous varices of the inferior sagittal sinus as a potential diagnostic pitfall, mimicking pericallosal artery aneurysms on neuroimaging, which may lead to unnecessary referral for neurointerventional management.
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