Snapshot A 13-year-old boy presents to his pediatrician due to noticing a lump under the nipple of his left chest. He reports mild pain when touched. There is no breast discharge or changes in the skin. On physical examination, pubic hair is Tanner stage IV and has a testicular volume of 9 mL bilaterally. Palpation of the left chest shows a 3.5 cm mass beneath the nipple. (Pubertal gynecomastia) Breast Abscess Clinical definition login to view 2 more bullets Epidemiology login to view 3 more bullets Presentation login to view 7 more bullets Treatment login to view 3 more bullets Mastalgia Clinical definition login to view 1 more bullet Etiology login to view 11 more bullets Treatment login to view 8 more bullets Fat necrosis Clinical definition login to view 2 more bullets Management login to view 10 more bullets Mondor's Disease Clinical definition login to view 3 more bullets Epidemiology login to view 7 more bullets Presentation login to view 2 more bullets Treatment login to view 1 more bullet Male Gynecomastia Clinical definition login to view 2 more bullets Etiology login to view 19 more bullets