Male Breast Anatomy and Pathology

Male Breast Anatomy and Pathology information for prospective patients


Male Breast Anatomy – The arterial of the male breast is abundant and arises from three main sources: the posterior intercostal arteries, the large lateral thoracic artery, and the internal mammary artery. The blood supply to the middle portion of the gland is derived by the intercostal branches of the internal mammary artery.  The lymphatic drainage of the breast is abundant and is derived by the superficial plexus and the deep plexus. The nerve supply is mainly from T2 to T5 intercostal branches.  After gynecomastia surgery sensation returns in over 98% of the cases.



Gynecomastia Gland Specimen (Gross Pathology) – The gland specimen above on the right shows distinctively that the gland can be divided into head, body and tail. The body is found under the aerola, the head is found towards the middle of the chest, and the tail reaches towards the armpit. This anatomical partition is surgically important because the surgeon must take care to remove all 3 components of the gland. If this is not done, the chance of recurrence of the gynecomastia condition is high.


Typical Gynecomastia Pathology – The microscopic slide reveals benign ductal epithelial hyperplasia and mild periductal stromal edema.