The Teaching Point

Optic nerve sheath dural arteriorvenous fistulas are acquired, atypical vascular malformations that can present with symptoms similar to carotid-cavernous fistulas and are often initially misdiagnosed. While they can be assessed with Computer Tomography (CT) and Magnetic Reasonance Imaging (MRI); catheter angiography is the gold standard for evaluating their vascular anatomy and can help guide treatment rationalisation.






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From the manuscript

Optic Nerve Sheath Dural Arteriovenous Fistula Misdiagnosed As A Carotid Cavernous Fistula

Free full text article: Optic Nerve Sheath Dural Arteriovenous Fistula Misdiagnosed As A Carotid Cavernous Fistula

Abstract
Dural arteriovenous fistulas (dAVf) are uncommon, acquired vascular lesions. Their location and vascular anatomy produces varied signs and symptoms and are misdiagnosed as other vascular anomalies. We present an atypical case of a dAVf identified along the left optic nerve sheath. The patient presented with progressive ophthalmological signs and was initially misdiagnosed with a left carotid-cavernous fistula. The aetiology, classification and treatment options are discussed.






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