CT scan image. Axial view. LCCARS and Stanford B aortic dissection. (Blue arrow, dissected aberrant right subclavian artery; red arrow, right common carotid artery; purple arrow, left subclavian artery; yellow arrow, left common carotid artery; green arrow, trachea.) CT = computed tomography, LCCARS = left aortic arch with common origin of the carotid arteries, left subclavian artery, and aberrant right subclavian artery.