Transient global amnesia associated with bilateral restricted diffusion in the lateral hippocampus

A 48-year-old man with no significant cardiovascular risk factors developed 3 h of severe anterograde and mild retrograde amnesia, repeatedly asking ‘Is this my coat?’ on emerging shivering from the (cold) English Channel. No other focal neurological symptoms were seen and by the time he reached the emergency department, he had fully recovered, had a normal neurological examination and did not recall the event. He had a past history of gout …