👉 Antepectoral is a term used in medical terminology to describe an area of tissue located between the shoulders and the breast. It's often referred to as the "underarm" because it's usually positioned below the armpit, which is the opening where the skin meets the muscle. Antepectolites are typically characterized by bulging or protruding skin that can be tender and painful. They may also have a slightly raised appearance due to the increased pressure of the breast tissue above them