A Case of Intracranial Dural Arteriovenous Fistula Mimicking Brainstem Tumor

Abstract

Tumor-like lesions were found in the right cerebellar hemisphere and pons on magnetic resonance imaging (MRI) [Figure 1]a,[Figure 1]b,[Figure 1]c,[Figure 1]d. Neither dilated vessel nor flow voids were detected around the brainstem. Clinical manifestation of intracranial dAVF is extremely heterogeneous, ranging from nondisabling tinnitus to intracranial hemorrhage, seizure, and venous hypertension encephalopathy. According to the Cognard classification, it was classified as a Type V fistula, which is characterized by perimedullary venous drainage associated with progressive myelopathy and brainstem dysfunction.