Presentation
Sudden onset of anterograde amnesia which was witnessed by her daughter. No focal neurological or epileptic signs. No recent history of head trauma. Cognitive impairment limited to amnesia.
Patient Data
No significant alterations in brain tissue density.
Representative 1.5 T MRI shown the typical tiny lesions on diffusion-weighted imaging in the lateral aspect of both hippocampal cornu ammonis (Sommer sector).
Post-contrast T1-weighted images show no enhancement in the medial temporal lobes.
Case Discussion
This case demonstrates that MRI plays a useful role in confirming the clinical diagnosis of transient global amnesia.