Arterial Blood Supply to the Mammary Gland

Description

Cross-section through the female mammary gland presents lobules (glandular acini) embedded within subcutaneous adipose tissue and tethered by fibrous septa consistent with Cooper ligaments, which run from the dermis toward the deep fascia over pectoralis major. Branching arteries course from the posterolateral chest wall into the gland, then divide into smaller arterioles that track alongside the lactiferous duct system toward the nipple-areolar complex. Medially, perforating branches consistent with the internal thoracic (internal mammary) artery enter the parenchyma near the parasternal region, while lateral contributions align with the lateral thoracic artery and pectoral branches of the thoracoacromial trunk; posteriorly, intercostal perforators can be inferred supplying the deep aspect adjacent to the pectoral fascia. Small paired veins and accompanying nerves typically parallel these vessels. A clear relationship to pectoralis major is maintained. Arterial mapping matters when you plan incisions and manage bleeding in breast surgery, because perforators from the internal thoracic artery and lateral thoracic artery are frequent sources of brisk intraoperative hemorrhage during mastectomy, lumpectomy, or subpectoral dissection. This arrangement also underpins nipple-areolar viability in reduction mammoplasty and reconstruction, where preservation of a reliable pedicle depends on understanding how arterial inflow reaches the subareolar plexus. Keep the vascular–ductal adjacency in mind. It is not optional. Use this artwork for gross anatomy and surgical anatomy teaching on the thoracic wall, breast, and axilla, and for textbooks or journal figures discussing breast-conserving surgery, oncoplastic techniques, or lactation physiology with an arterial emphasis. It also suits patient-education handouts explaining why scars and flap choices relate to blood supply. Anatomical accuracy verified by SciePro's Medical Advisory Board.