Vella Stephanie, Grech Reuben
Basic Specialist Trainee, Medical Imaging Department, Mater Dei Hospital, Msida, Malta.
Consultant Radiologist, Medical Imaging Department, Mater Dei Hospital, Msida, Malta.
BJR Case Rep. 2020 Sep 29;6(2):20190111. doi: 10.1259/bjrcr.20190111. eCollection 2020 Sep.
Transient global amnesia (TGA) is a disorder characterised by a temporary, reversible disruption of short-term memory. While the diagnosis of TGA is based on its clinical features, neuroimaging is important to exclude other sinister causes of global amnesia. Furthermore, classical MRI changes in TGA have been well described in the literature. These consist of unilateral or bilateral punctuate areas of hyperintensity in the hippocampal cornu ammonis 1 (CA1) region on diffusion-weighted imaging. We describe a case of a 61-year-old gentleman, presenting with symptoms of transient memory loss and confusion. A stroke was initially suspected in view of his multiple risk factors. Timely MRI demonstrated the typical findings associated with TGA. Recognition of these imaging features is of the utmost importance for radiologists in order to allow for an accurate diagnosis and differentiation from ischaemic pathology.
短暂性全面性遗忘症（TGA）是一种以短期记忆的暂时、可逆性中断为特征的病症。虽然TGA的诊断基于其临床特征，但神经影像学对于排除导致全面性遗忘症的其他严重病因很重要。此外，TGA的典型MRI变化在文献中已有充分描述。这些变化包括在扩散加权成像上，海马齿状回1（CA1）区域出现单侧或双侧点状高信号区。我们描述了一例61岁男性患者，表现为短暂性记忆丧失和意识模糊症状。鉴于他有多种危险因素，最初怀疑为中风。及时的MRI显示出与TGA相关的典型表现。对于放射科医生来说，认识这些影像学特征对于准确诊断以及与缺血性病变进行鉴别至关重要。
