Gynecomastia can be categorized into 4 grades. These are based on amount of breast tissue, feminization of the breasts, and condition severity.
Grade 1: Mild – Small amount of tissue surrounds the areola.
Grade 2: Moderate to High – Moderate enlargement of breast that passes the areola boundary.
Grade 3: High & Visible – Skin redundancy in addition to moderate enlargement of breast that passes the areola boundary.
Grade 4: Severe & Feminine – Profound enlargement of the breasts with feminized breasts and skin redundancy.