Structures | Cranial | Caudal | Anterior | Posterior | Lateral | Medial |
---|---|---|---|---|---|---|
Chest wall | Caudal border of the clavicle head | Contralateral inframammary fold | 2Â mm below the skin surface | Rib-pleural interface | Mid-axillary line | Sternal-rib junction |
Supra-clavicular | Caudal to the cricoid cartilage | Junction of brachioecph.- axillary veins/caudal edge clavicle head | Posterior edge of SCM muscle | Anterior aspect of the scalene muscle | Cranial: lateral edge of SCM muscle | Excludes thyroid and trachea |
Caudal: junction 1st rib-clavicle | ||||||
Infra-clavicular | Pectoralis minor muscle insert on coracoid | Axillary vessels cross medial edge of pectoralis minor muscle | Posterior surface of pectoralis major muscle | Ribs and intercostal muscles | Medial border of pectoralis minor muscle | Thoracic inlet |
Internal mammary | Superior aspect of the medial 1st rib. | Cranial aspect of the 4th rib | Encompass the internal mammary vessels | Encompass the internal mammary vessels | Encompass the internal mammary vessels | Encompass the internal mammary vessels |