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November 4, 1961

Gynecomastia in Adolescent Boys

Author Affiliations

New York City; Port Chester, N.Y.; New York City

From the Department of Medicine, Memorial Center for Cancer and Allied Diseases at The Cornell Medical College. Formerly Senior Assistant Resident, Department of Medicine (Dr. Nydick), formerly assistant resident, Department of Medicine (Dr. Bustos) and Chairman, Department of Medicine (Dr. Rawson), Memorial Center for Cancer and Allied Diseases; formerly Second (Cornell) Medical Division, Bellevue Hospital (Dr. Nydick) and Professor of Medicine, Cornell Medical College (Dr. Rawson). Dr. Nydick is now at the Endocrinology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Md., and Dr. Bustos is now at Paz Building, Taft Ave., Manila, P.I.

JAMA. 1961;178(5):449-454. doi:10.1001/jama.1961.03040440001001

In an attempt to establish the incidence and duration of pubertal gynecomastia and to correlate the condition with other changes of puberty, 2,369 examinations were made of 1,890 normal boys in a Boy Scout camp. After excluding all obese boys, the data from 1,855 examinations were analyzed. The over-all incidence of gynecomastia was 38.7% (28.9% in Negroes). The peak incidence of 64.6% occurred in the 14- to 14 1/2-year-old group. In 27.1% of the cases it persisted through 2 seasons, and in 7.7% for 3 seasons. We recommend that adolescent gynecomastia should not be treated either surgically or with hormones, but that the boy and his parents should be assured that this is a normal phenomenon of puberty which will disappear within 1 or 2 years.