2013 Volume 35 Issue 3 Pages 203-208
We report the case of a 68-year-old man with thalamic dementia due to a dural arteriovenous fistula (DAVF). Intracranial DAVF represent approximately 10% to 15% of all intracranial arteriovenous malformations. He had been treated for DAVF of transverse sinus-Sigmoid sinus for the past three years. Obstruction of the right sigmoid sinus that provided the main drainage caused venous hypertension of deep venous around the thalamic lesion. Computed tomography (CT) of the brain revealed a symmetric hypodense lesion, T2 weighted MRI and FLAIR sequence of the brain revealed a symmetric hyperintense lesion of bilateral thalamus. Bilateral lesions of the thalamus characteristically present with specific neurological and neuropsychological patterns. After treatment of DAVF, his cognitive disorder was improved obviously. In addition, the low density area on the CT, and the high intensity area on T2 weighted MRI and FLAIR sequence had gradually disappeared. It was suspected that venous congestion as vasogenic edema is a reversible lesion. Thus, we concluded that early diagnosis and treatment must be important.
