Fig. 2

Discriminating and overlapping features of acute aortic syndrome. In addition to the certain discriminating features as revealed by recent advances in imaging, each disease in acute aortic syndrome (AAS) may show overlapping features and transition from one to another. In such overlapping and transitional features of aortic diseases, the diagnosis may be affected by the time point at which the imaging has been examined and also by the detectability of tiny pathology by the imaging modality. Awareness of some related and distinguishing radiologic features in AAS is helpful in understanding these diseases and providing new insight into the pathophysiology