Female Chest and Pectoral Muscles, Gross Anatomy

Description

Centered on the anterior female thorax, the pectoralis major spans from the medial clavicle, sternum, and costal cartilages to its lateral insertion on the humerus, forming the anterior axillary fold at its inferolateral border. Deep to it, the pectoralis minor runs superolaterally from ribs 3 to 5 toward the coracoid process, lying anterior to the serratus anterior on the lateral chest wall. Superficial breast tissue overlies the pectoral fascia, with the nipple and areola positioned on the anterior surface and the inframammary fold marking the inferior contour. Landmarks such as the sternum medially and the clavicle superiorly anchor orientation. For operative planning, this relationship between breast, pectoral fascia, and underlying muscle matters. Subpectoral implant placement or tissue expander reconstruction relies on the plane deep to pectoralis major, and the inferolateral muscle border helps define the pocket while preserving the inframammary fold. The same anatomy guides mastectomy dissection along the pectoral fascia and helps explain why pectoral nerve involvement can contribute to postoperative chest wall pain, and why axillary access risks injury to the long thoracic nerve with resultant serratus anterior weakness and scapular winging. Small distance, high stakes. Use this artwork in gross anatomy and surface anatomy teaching to connect palpable landmarks (clavicle, sternum, anterior axillary fold) to deeper layers, or in breast surgery, plastic surgery, and oncology publications discussing mastectomy planes, reconstruction options, and axillary approaches. It also fits patient-facing education that needs an anatomically correct view of the female chest without distracting extraneous detail. Anatomical accuracy verified by SciePro's Medical Advisory Board.