case_images: PMC10750302_01
case_images: (A) A 69-year-old woman with downbeat nystagmus due to hypomagnesemia underwent arterial spin labeling, which revealed hyperintensity in the cerebellar nodulus. (B) After 5 months of follow-up, the magnesium levels normalized. Downbeat nystagmus disappered and hyperintensity improved.
case_images: AMS2-10-e915-g001.jpg
case_images: PMC10750302_01_AMS2-10-e915-g001.jpg
case_images: ams2915-fig-0001
case_images: Head magnetic resonance imaging showed no abnormalities on T1-, T2-, or diffusion-weighted imaging; however, arterial spin labeling (ASL) revealed hyperintensity in the cerebellar nodulus (Figure 1A). The magnesium levels normalized to 1.8 mg/dL and hyperintensity improved by ASL imaging (Figure 1B).