Thoracic Outlet Syndrome with Subclavian Artery Thrombosis Caused by Synostosis of the First and Second Ribs: A Case Report.

Case: A 43-year-old woman presented with pain, paresthesia, and coldness of the right upper extremity suggestive of the diagnosis of thoracic outlet syndrome. Three-dimensional computed tomography angiography revealed that the right subclavian artery was constricted because it traveled over an abnormal first rib. After anticoagulation and antithrombotic therapy, the patient underwent resection of the abnormal first rib. Postoperative angiography documented improvement over time of the poststenotic dilatation and recanalization of the subclavian artery capable of delivering almost normal distal flow. Conclusion: Arterial reconstruction is not always necessary for the treatment of arterial thoracic outlet syndrome associated with poststenotic dilatation of the subclavian artery. [ABSTRACT FROM AUTHOR]