case_images: PMC5225695_01
case_images: Three-dimensional volume rendering of magnetic resonance imaging (a) showing dolichoectasia of the right vertebral artery and basilar artery. A hypoplastic left vertebral artery is not seen. Thin-slice magnetic resonance imaging with fast imaging employing steady-state acquisition (b), and magnetic resonance angiography source images (c). The right abducent nerve (black arrow) is straight; however, the left abducent nerve (white arrows) is compressed upward and outward by a basilar artery. Bilateral abducent nerves (black and white arrows) are distinguished from bilateral anteroinferior cerebellar arteries (arrowheads) shown in magnetic resonance angiography source images
case_images: JNRP-8-124-g001.jpg
case_images: PMC5225695_01_JNRP-8-124-g001.jpg
case_images: F1
case_images: MRA and three-dimensional volume rendering of MRI [Figure 1a] showed dolichoectasia of the right vertebral artery (VA) and basilar artery (BA). Thin-slice MRI with FIESTA clearly showed that the right abducent nerve was straight; however, the left abducent nerve was compressed upward and outward by an elongated BA [Figure 1b]. The left abducent nerves were distinguished from bilateral anteroinferior cerebellar arteries (AICA) on comparing MRA source images [Figure 1c].