Maximum intensity projection (MIP) of chest CT after contrast injection. Origin of the left common carotid artery, arising from the ascending aorta as the first branch of the aortic arch (black arrow) and partial view of the Kommerell diverticulum with kinking of the normal-sized distal left subclavian artery (white arrow) are seen. Note the dense pericardial effusion due to pericardial hemorrhage (asterisk)