Anterolateral Thoracic Wall in Women, Gross Anatomy

Description

Oriented to the anterolateral thoracic wall of an adult woman, the profile view brings the breast and overlying skin envelope into relation with the bony and muscular scaffold of the chest. Superficially, the clavicle lies superior to the breast mound, the sternum sits medially, and the costal margins sweep inferiorly toward the upper abdominal wall, while the axilla marks the lateral junction of thorax and upper limb. Deep to the mammary region, pectoralis major occupies the anterior chest, its lateral border approaching the anterior axillary line; serratus anterior wraps the lateral ribs posterior to it, and the rib interspaces course obliquely between. Surface anatomy matters here. Clinical teaching often hinges on this specific anterolateral perspective because it clarifies where the breast sits on the thoracic wall, typically spanning ribs two through six and extending from the lateral edge of the sternum toward the midaxillary line, a relationship that guides both examination and operative planning. Surgeons use these landmarks when selecting incisions for lumpectomy or mastectomy and when orienting dissection in the axillary tail of the breast (tail of Spence) during sentinel lymph node biopsy, where the long thoracic nerve on serratus anterior and the intercostobrachial nerve crossing the axilla are at risk. Proceduralists also reference the lateral rib spaces for chest tube insertion, keeping the neurovascular bundle protected along the inferior border of each rib. Use this artwork in gross anatomy lab manuals, breast and thoracic wall chapters in medical textbooks, or clinical skills materials covering breast exam technique, axillary staging, and safe zones for thoracostomy. It also fits patient education for breast surgery planning and reconstruction discussions that hinge on chest wall and axillary landmarks. Anatomical accuracy verified by SciePro's Medical Advisory Board.