Abnormal origin of the left common carotid artery by innominate artery: a case of enlargement mediastinum.

An abnormal origin of the left common carotid artery is rare. A 71-year-old male was presented with a cough, fever and dyspnea. A chest radiography revealed a widening of the superior mediastinum. An abnormal origin of the left common carotid artery by innominate artery was diagnosed by angiography.