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case_images: Magnetic resonance imaging (MRI) on the day of examination (a) and 14 days later (b).
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case_images: Two days after the first visit, his symptoms flared up, and his head MRI showed only an old cerebral infarction and no new lesion (Figure 1a). On the same day, we suspected stroke, encephalitis or chorea, and head MRI was repeated, in which T1-weighted imaging showed a high signal in the right putamen, which was considered diabetic chorea (Figure 1b).