Costoclavicular space

Last revised by Frank Gaillard on 20 Apr 2021

The costoclavicular space is the anterior portion of the superior thoracic aperture, between the clavicle and first rib. The subclavian vessels and brachial plexus pass though the space related to the scalene muscles. Proximally, the plexus passes through the scalene triangle, and distally through the subcoracoid space.

Its borders are:​

Related pathology

The costoclavicular space narrows when the arm abducts 4 which explains its association with thoracic outlet syndrome

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