Acute arterial thromboembolism of the upper extremity associated with the thoracic outlet syndrome differs in many ways from a cardiogenic embolism, particularly in its pathophysiology and management. The neurovascular manifestations have been attributed to a number of separate entities, the main ones being the cervical rib, scalenus anticus, costoclavicular, and hyperabduction syndromes. Recently we experienced a case of acute subclavian artery thromboembolism due to thoracic outlet syndrome and achieved excellent results by surgical treatment. During 3-month follow up periods there was no evidence of recurrence or complications.