Gynecomastia is common among men. Pseudogynecomastia, caused by an increased subcutaneous fat in the mammary area, can be confused with gynecomastia. We report our experience with the surgical treatment of both making a review of medical records of 106 patients, aged 15 to 50 years, operated at the Plastic Surgery Unit of the Military Hospital and Clínica Santa María in Santiago (Chile). Thirty two percent of patients had a pure gynecomastia, 29, 4% had pseudogynecomastia, and 38, 8% had both conditions. All were mild or moderate. A mastectomy plus liposuction was performed in 50% of patients, solely mastectomy in 26, 4% and solely liposuction in 26, 4%. There were surgical complications in 3, 8% such as hematomas or echymoses. As a conclusion: Ginecomastia is a frequent pathology in young men that can produce aesthetic and psychological pathologies. Surgical treatment requires liposuction in most patients to achieve a good result.