Dot-Like Hippocampal Hyperintensities on Diffusion-Weighted MRI in a Patient With Vomiting Caused by Benign Paroxysmal Positional Vertigo Without Amnesia.

Abstract

Dot-like hippocampal hyperintensities on diffusion-weighted magnetic resonance imaging (DWI) are characteristic findings of transient global amnesia (TGA).1 These hyperintensities present as single or multiple hyperintensities in one or both hippocampi. However, some studies have reported that these lesions were present in patients without amnesia, a characteristic symptom of TGA.2-4 We report a case of dot-like hippocampal hyperintensities on DWI in a patient with benign paroxysmal positional vertigo without amnesia.