is often termed pseudogynecomastia [3] or sometimes lipomastia . [4] Gynecomastia should be distinguished from muscle hypertrophy of the pectoralis muscles caused by exercise (e.g., swimming , bench press , etc.). ^ a b c Braunstein, Glenn D. (Feb 18 1993). "Gynecomastia". New England Journal of Medicine 328 (7): 490–5. doi