Abstract
A right-handed 68-year-old man presented with acute-onset memory impairment. Before the event, he was doing well in his daily life. He had a history of hypertension. On the Seoul Neuropsychological Screening Battery, his verbal memory functions exhibited significant impairments (31.82 percentile for immediate recall, 1.09 percentile for delayed recall, and 2.22 percentile for delayed copy). A brain MRI revealed an acute infarction in the left mammillary body (figure 1), and CT angiography revealed focal stenosis of the bilateral posterior cerebral arteries (figure 2).
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