Axillary Vein, Anterior View

Description

Anteriorly, the axillary vein is traced from the lateral border of the first rib as the continuation of the subclavian vein to the inferior margin of teres major, where it becomes the brachial veins proximally in the upper limb. Medial and slightly anterior to the axillary artery, the vein lies in close apposition to the artery within the axillary sheath, with the cords of the brachial plexus arranged around the arterial axis. Superiorly, the clavicle and first rib frame the thoracic inlet, while the humeral head and glenoid of the scapula sit lateral to the main vascular bundle. For teaching, this perspective clarifies the frequent point of confusion between axillary vein and artery as they pass deep to pectoralis minor and transition to the subclavian vessels at the first rib rather than at the clavicle. Venous access and complication avoidance depend on these relationships, since axillary venipuncture and infraclavicular central venous catheter approaches risk arterial puncture or brachial plexus irritation when needle trajectory strays lateral or posterior. Short and crowded anatomy. Course directors can drop this plate directly into upper-limb anatomy blocks, thoracic outlet and central line modules, or surgical texts covering axillary lymph node dissection and deltopectoral approaches where venous tributaries and the axillary sheath are practical landmarks. It also suits patient-facing education for pacemaker lead placement discussions, where understanding venous entry into the subclavian system reduces ambiguity. Anatomical accuracy verified by SciePro's Medical Advisory Board.