Fig 2. A 63-year-old man with a right sensory deficit for 10 hours. Initial MR imaging (63 hours after onset) demonstrates a focal DWI and FLAIR hyperintensity in the left brain stem (arrow). On follow-up MR imaging (6 months after onset), a small permanent injury can be seen as a dark signal intensity on T1-weighted sequence and a bright signal intensity on FLAIR/T2-weighted sequence in the corresponding area.