TY - CHAP M1 - Book, Section TI - Gynecomastia A1 - Gagliano-Jucá, Thiago A1 - Basaria, Shehzad A2 - Bhasin, Shalender A2 - O’Leary, Michael P. A2 - Basaria, Shehzad S. PY - 2021 T2 - Essentials of Men’s Health AB - Gynecomastia is the benign enlargement of the glandular tissue of the male breast. It is clinically defined by the presence of a mass extending concentrically beneath the nipple and is usually bilateral. Gynecomastia is categorized as physiological (during infancy, puberty, older age) or pathological (hypogonadism, liver disease, hyperthyroidism, drug-related). The glandular changes are the same, regardless of the etiology, with the degree of glandular proliferation depending on the duration and intensity of the inciting factor. SN - PB - McGraw Hill CY - New York, NY Y2 - 2024/03/29 UR - accessmedicine.mhmedical.com/content.aspx?aid=1174515561 ER -