Venous Thoracic Outlet Syndrome with an Upper Extremity Deep Vein Thrombosis Caused by a Dislocated Clavicle Fracture: A Case Report.

BACKGROUND Clavicle fractures are a relatively common injury, and are not problematic when occurring alone. Venous thoracic outlet syndrome (TOS) is generally caused by compression of the subclavian vein between the first rib and oblique muscles, and is often complicated by the presence of upper extremities deep vein thrombosis (UEDVT). Herein, we present a case of venous TOS complicated with UEDVT due to a dislocated clavicle fracture. CASE REPORT A 29-year-old man was injured in a motorcycle accident. The patient's right clavicle was fractured, and the distal part of the fracture had dislocated into his right thorax. Contrast-enhanced computed tomography showed an obstruction of the subclavian vein by the dislocated clavicle and thrombus on the distal side of the obstruction. Anticoagulant therapy was not indicated because of other injuries, such as traumatic subarachnoid hemorrhage. No vena cava filter was placed in the superior vena cava owing to the relatively low volume of the thrombus. Alternatively, intermittent pneumatic compression to the right forearm was initiated. On day 6, surgical reduction of the clavicle was performed. The thrombus remained after the reduction. The patient received anticoagulation therapy with heparin followed by oral anticoagulants. The patient was discharged without any complications of UEDVT or bleeding. CONCLUSIONS Venous TOS with UEDVT caused by trauma is rare. Anticoagulation therapy, pneumatic limb compression, and vena cava filter placement should be considered according to the degree of the obstruction and other associated injuries.