Thoracodorsal Artery, Lateral View

Description

Oriented in lateral profile, the thoracodorsal artery is traced as a distal continuation of the subscapular artery from the third part of the axillary artery, descending along the posterior axillary wall toward the deep surface of latissimus dorsi. Posterior to the humerus and inferior to the glenohumeral joint, the vessel courses with the thoracodorsal vein and the thoracodorsal nerve, then arborizes into muscular branches (arterioles) that spread across the lateral thoracic wall and posterior axillary fold. Adjacent bony landmarks such as the ribs, scapula, and proximal humerus help anchor its relationship to the axilla and upper limb. Small ramifications emphasize the segmental perfusion pattern within the muscle belly. For reconstructive and oncologic surgery, this artery matters because it defines the dominant pedicle of the latissimus dorsi flap, a workhorse option for breast reconstruction, chest wall coverage, and upper extremity soft-tissue defects. Pedicle dissection during axillary lymph node clearance places the thoracodorsal neurovascular bundle at risk, and inadvertent injury can compromise flap viability or latissimus function. A clean lateral viewpoint clarifies why the vessel sits posterior and inferior to the axillary vein while remaining tethered to the scapular side of the axilla. Clear landmarks. Safer planning. Educators can drop this artwork into gross anatomy labs, vascular anatomy lectures, and surgical teaching modules on axillary approaches, including latissimus dorsi flap harvest and posterior axillary fold exposure. Publishers will find it well suited for atlases, operative technique manuals, and patient-facing explanations of flap options where a profile view reads quickly without crowding the field. Anatomical accuracy verified by SciePro's Medical Advisory Board.