case_images: PMC4802985_01
case_images: Cerebral magnetic resonance image. Top row: Axial T2-weighted images. Bottom row: Axial, sagittal, and coronal T1-weighted images with intravenous contrast. A well-defined elongated extra-axial lesion located anterior within the right middle cranial fossa, with slightly heterogeneous high signal intensity on T2-weighted images, and high homogeneous contrast enhancement
case_images: SNI-7-156-g001.jpg
case_images: PMC4802985_01_SNI-7-156-g001.jpg
case_images: F1
case_images: Magnetic resonance images (MRIs) were performed, revealing an elongated well-defined extra-axial abnormality, located in the anterior aspect of the middle cranial fossa, showing high signal on T2-WI, intense homogeneous enhancement after intravenous contrast administration, and absence of flow voids or pulsation artifacts [Figure 1].
case_images: Cerebral computed tomography-angiography images with maximum intensity projection reconstructions in venous phase demonstrating the absence of connections between branches of the middle cerebral artery and the superficial Sylvian vein lesion
case_images: SNI-7-156-g002.jpg
case_images: PMC4802985_01_SNI-7-156-g002.jpg
case_images: F2
case_images: The M1 and M2 segments of the middle cerebral artery were adequately visualized without an evidence of arteriovenous communication to the lesion or dilatation that suggested hyper flow [Figure 2].
case_images: A three-dimensional reconstruction of cerebral computed tomography angiography venous phase images showing a large dilation of the superficial Sylvian vein. No abnormal arterial connection is noticed
case_images: SNI-7-156-g003.jpg
case_images: PMC4802985_01_SNI-7-156-g003.jpg
case_images: F3
case_images: Furthermore, the absence of dilation of the external carotid artery branches, specifically the middle meningeal artery ruled out the presence of an arteriovenous fistula [Figure 3].