Thoracic Outlet Syndrome "Recurrence"

Thoracic outlet syndrome encompasses a number of lesions which compress the neurovascular supply to the upper extremity. This bundle passes between the scalenus and medius muscles, the clavicle and first rib, and subsequently behind the pectoralis minor muscle. Abnormality of any of these structures, especially a rudimentary cervical rib (with a fibrous band to the first rib) may compress it. Most of the patients are female, often with droopy shoulders and swan necks. It has also been related to hypertension trauma, military backpacks, and abnormal posture with the chin protruded. It has been added by some to the group of "cumulative trauma disorders" (repetitive stress syndrome)exemplified by CTS.