Fig. 2

a Computed tomography of the cervical arch aneurysm with a maximal extend of 6 cm. * marks the origin of the left axillary artery. b Membrane of the type B dissection directly deriving from the aneurysm (arrow). c Lateral view with the localisation of the aneurysm in the upper posterior mediastinum. The subclavian artery branches from the top of the aneurysm and runs to the anterior part of the upper mediastinum (*). The dissection membrane starts inside the aneurysm to the abdominal aorta