Definitions-aortic aneurysms

• True (≥50% dilation of all 3 layers; <50% = ectasia) vs. false (rupture w/in adventitia)
• Location: root (annuloaortic ectasia), thoracic aortic aneurysm (TAA), thoracoabdominal aortic aneurysm (TAAA), abdominal aortic aneurysm (AAA)
• Type: fusiform (circumferential dilation) vs. saccular (localized dilation of aortic wall)