Diagnostic workup for thoracic outlet syndrome usually includes which of the following?

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Diagnosing thoracic outlet syndrome requires a multi-faceted approach because symptoms can arise from nerves or vessels and can resemble other upper-extremity conditions. A thorough history and physical exam identifies the symptom pattern and helps reproduce the issues with provocative maneuvers that stress the outlet, supporting the clinical suspicion. Imaging studies are used to visualize the outlet and surrounding structures, looking for anatomical causes of compression such as a cervical rib, first rib anomalies, or scalene hypertrophy, and to assess vascular involvement with arterial or venous flow. Nerve conduction studies add information about nerve function, helping to characterize a neurogenic pattern and to exclude other neuropathies that could mimic TOS. Because no single test confirms all cases, combining history and exam, imaging, and electrodiagnostic testing provides a comprehensive workup. That’s why all of these are typically included.