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A case of recurrent transient global amnesia: don't forget the hippocampal punctuate diffusion restriction.
Oxford Medical Case Reports 2018 June
Transient global amnesia (TGA) is a syndrome characterized by reversible impairment of short-term memory. TGA itself is a benign disease, however, it is reasonable to investigate and exclude sinister causes of global amnesia; such as stroke or a seizure activity. A case of TGA is presented here with special emphasis on the typical TGA lesion that was detected on the patient's magnetic resonance imaging (MRI) of Brain. In patients with TGA, the typical MRI Brain finding is a tiny focus of diffusion restriction in the mesiotemporal lobe. This finding can potentially aid in early diagnosis and management of TGA. Although in overwhelming majority of cases, the TGA episode occurs only once, yet a second TGA episode can occur rarely. This patient, two years later, had a recurrence of TGA episode, albeit with a normal MRI brain, and without residual changes from prior episode.
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