axillary sheath

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ax·il·lar·y sheath

fibrous neurovascular sheath formed as an extension of the prevertebral layer of deep cervical fascia through the cervicoaxillary canal, that encloses the first part of the axillary artery, the axillary vein, and the brachial plexus.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
From the interscalene triangle through the axilla, the structures are covered by the axillary sheath, a thin layer of connective tissue derived from the prevertebral fascial layer.
Pectoralis major and minor muscles were reflected and the clavipectoral fascia removed together with the axillary sheath which surrounded the axillary vessels and the brachial plexus.