Figure 1

Axial T2-weighted and diffusion weighted images. A and B: Axial T2-weighted and diffusion weighted images (DWI) of the MRI 24 hours after presentation. The thin white arrow denotes the absent flow void of the right vertebral artery. C, D and E: Axial T2-weighted, DWI and apparent diffusion coefficient (ADC) of the same region 4 days later. The bold white arrows denote the infarct at the right medullary region and the white circle indicates the low ADC.