Sudden deafness as a prodrome of cerebellar artery infarction: Three case reports

Figure 1 Related auxiliary examination of case one. A: Pure tone auditory threshold, moderate to severe sensorineural hearing loss in the right ear; B, C: Mastoid magnetic resonance imaging (MRI)(2019-11-12), no obvious abnormalities were found in bilateral internal auditory canal and mastoid process, see pontine lacunar infarction; D, E: Brain MRI (2019-11-19), patchy long T1 and long T2 signal foci were seen in the right cerebellar foot, and diffusion-weighted imaging showed high signal intensity; F–I: Brain and neck computed tomography angiography, patchy low-density shadow was seen in the right cerebellar foot, local lumen stenosis of the right posterior cerebral artery and basilar artery was not clear.

Figure 2 Related auxiliary examination of case two. A: Pure tone auditory threshold, extremely severe sensorineural deafness in the left ear; B–E: Brain magnetic resonance imaging, ovoid slightly longer T1 slightly longer T2 signal lesion was observed in the left cerebellar foot, and diffusion-weighted imaging presented high signal; F–I: Brain and neck computed tomography angiography, patchy, slightly low-density lesions were seen in the left pontine angle, with intracranial segmental stenosis of the left vertebral artery.

Figure 3 Related auxiliary examination of case three. A: Pure tone auditory threshold, extremely severe sensorineural deafness in the left ear; B–E: Brain magnetic resonance imaging, patchy and spotted long T1 and long T2 signal shadows were seen in the left midcerebellar foot, and the diffuse image of lesions in the left midcerebellar foot was all high signal; F–I: Brain and neck computed tomography angiography, patchy low-density shadow was seen in the left cerebellum, with slightly blurred edges and a range of about 2.2 cm × 1.6 cm. The initial segment of the left vertebral artery was tortuous and the left vertebral artery V4 segment was moderately and severely narrowed.