Fig. 2From: A rare case of bilateral cervical vagal neurofibromas: role of high-resolution ultrasound a Axial sonogram (5–12-MHz) showing a hypoechoic mass (M, dash line) centered on the right carotid sheath, between the internal jugular vein (IJA) and the common carotid artery (CCA). b Axial sonogram (5–12-MHz) showing a hypoechoic mass (M, dash line), vagus nerve (arrow) and common carotid artery (CCA). c The coronal T2-weighted MR imaging shows a 7.7 cm × 4.1 cm × 3.0 cm well-defined hyperintense mass adjacent to the right internal carotid artery. d The right tumor appeared hypointense on coronal T1-weighted MR imagingBack to article page