Surgical treatment for rare isolated left innominate vein aneurysms.

Thoracic venous aneurysms are rare, with the fusiform superior vena cava being the most commonly reported. Isolated innominate vein aneurysms are extremely rare. Herein, we report the case of a saccular left innominate vein aneurysm with an intraluminal thrombus treated with surgical excision and simple reconstruction of the innominate vein.