Fig. 2

Imaging examination of dissection. a CTA and (b) DSA showing only the stenosis (white arrowhead) of right ICA, about 3.5 cm above the carotid bulb and 2.5 cm in length, the (c) MRA showing the right ICA stenosis as well as the surrounding hematoma (white asterisk) within the arterial wall. The white arrow indicates the right vertebral artery. d Coronal T2-tse-vfl sequence showing the hypo signal of right ICA and hyper signal hematoma (white asterisk), tortuous right vertebrobasilar artery (long white arrow) cross the midline to the left, and normal left ICA (short white arrow). e Axial T2-tse-tra-fs sequence showing enlarged right ICA with hematoma within vascular wall (black asterisk), as well as a stenotic true lumen (white arrowhead), and the opening of the false lumen (single white arrow) which may indicate the tearing of intima. Normal left ICA was annotated with a double white arrow. f Axial T1-tse-tra-2 mm sequence and (g) sagittal MPR showing the dissected right ICA, certificate with stenotic true lumen (white arrowhead) and within vascular crescent hematoma (black asterisk); the deformed internal jugular vein (white blank arrow) and hypoglossal nerve within hypoglossal canal (double white arrow) may be compressed by enlarged right ICA. h coronal T2-tse-vfl sequence and (i) pd-tse-tra-fs sequence showing the contents within the right hypoglossal canal has a fatter shape larger than that within the left (white dotted oval)