Two Cases of Venous Thoracic Outlet Syndrome Diagnosed by Sitting Position Venography

Abstract

We herein report two cases of venous thoracic outlet syndrome (VTOS) diagnosed by per-forming venography in the sitting position.
Case presentations: The first patient was a female in her 30s with a history of right subclavian vein thrombosis. Contrast-enhanced (CE) computed tomography (CT) did not indicate VTOS. Venous stenosis was observed when venography in the sitting position was performed on the patient. Stenosis was successfully resolved by surgery. The second patient was a female in her 30s with a history of left subclavian vein thrombosis. She repeatedly experienced discomfort in her left arm. CE-CT failed to in-dicate VTOS, whereas venography in the sitting position with her arm raised revealed venous occlusion. Surgery resolved her discomfort.
These two cases demonstrated the use-fulness of performing venography in the sitting position for diagnosis and treatment planning in patients with VTOS.