thoracic outlet syndrome
Also written as: TOS — Thoracic Outlet Syndrome
Compression of neurovascular structures passing through the thoracic outlet, causing arm symptoms.
Full Definition
Thoracic outlet syndrome encompasses a group of conditions caused by compression of the brachial plexus, subclavian artery, or subclavian vein as they pass through the thoracic outlet. The syndrome is classified into three types: neurogenic (most common, affecting the brachial plexus), arterial (affecting the subclavian artery), and venous (affecting the subclavian vein, also known as Paget-Schroetter syndrome). Symptoms vary by type but may include arm pain, numbness, weakness, or swelling. Vascular complications can include thrombosis, embolization, or aneurysm formation.
Usage
Usage note: Specify the subtype (neurogenic, arterial, or venous) when possible for clinical clarity.
In Context
- "The patient's symptoms were consistent with neurogenic thoracic outlet syndrome." — Clinical assessment
- "Venous thoracic outlet syndrome required urgent thrombolysis and first rib resection." — Treatment plan