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©2013 UpToDate ® Print Email Anatomy of the thoracic outlet The thoracic outlet refers to the confined space between the clavicle and first rib. Structures that pass through this region include the nerves of the brachial plexus, the subclavian artery and subclavian vein.
©2013 UpToDate ® Print Email Anatomy of the thoracic outlet The thoracic outlet refers to the confined space between the clavicle and first rib. Structures that pass through this region include the nerves of the brachial plexus, the subclavian artery and subclavian vein. Cervical rib causing thoracic outlet syndrome Thoracic outlet syndromes are due to compression of any of the structures (brachial plexus, subclavian artery, subclavian vein) that traverse the confined space between the clavicle and first rib. Anatomic abnormaliaties such as a cervical rib (shown), musculotendinous abnormalities or scarring can contribute to the pathology.