Massive cerebellar infarction caused by spontaneously isolated posterior inferior cerebellar artery dissection: A case report

Figure 1 Neuroimaging findings of the patient during hospitalization. A: Head computed tomography (CT) on admission showing a massive low-density lesion in the right cerebellar hemisphere and vermis; B and C: Craniocervical CT angiography on admission shows no obvious arterial stenosis or occlusion; D-I: Magnetic resonance imaging (MRI) showing a massive acute infarction in the right cerebellar hemisphere and vermis and lesions with limited diffusion on diffusion-weighted imaging (D, E; arrows), hypointensity on the apparent diffusion coefficient map (F, arrow) and T1-weighted imaging (T1WI), and (G) hyperintensity on T2-weighted imaging (H, arrow) and fluid-attenuated inversion recovery MRI (I, arrow); J: Blood supply area of the posterior inferior cerebellar artery (PICA); the dark blue area is the arterial territory of the lateral branch of the PICA, and the light blue area is that of the medial branch.