Retroesophageal right subclavian artery (lusoria) as origin of traumatic aortic rupture

Abstract

A retroesophageal right subclavian artery (lusoria) is unusual for the surgeon, yet common regarding pathological findings (0.5-2%). Complications arising from it are rare (dysphagia). We report a case of traumatic descending aortic tear originating from a lusoria. The patient had experienced chest trauma due to a skiing accident. CT scan revealed an intramural haematoma of the proximal descending aorta. As a coincidence finding, a retroesophageal right subclavian artery was diagnosed. The patient was first treated conservatively. After an initial period--of stable patient conditions--repeated CT scan revealed a haematoma enlargement and surgery was scheduled: A localized aortic tear was suspected through CT scan, yet no aortic tear or flap was visible. During a two-staged surgical procedure, transpositioning of the lusoria into the right common carotid artery was performed, followed by replacement of the distal aortic arch during a second session using a single-branched Dacron tube graft. The left subclavian artery was then reinserted into the side-branched graft after reuptake of extracorporeal circulation. Extracorporeal circulation was applied via the femoral vessels and circulatory arrest in combination with deep hypothermia. After surgery, the patient was stable, having no signs of neurocognitive dysfunction or dysphagia.