breast disorder gynecomastia http://purl.bioontology.org/ontology/MEDDRA/10018800 http://purl.bioontology.org/ontology/MEDDRA/10018801 http://purl.bioontology.org/ontology/MESH/D006177 http://purl.bioontology.org/ontology/SNOMEDCT/4754008 http://purl.obolibrary.org/obo/DOID_12698 http://purl.obolibrary.org/obo/HP_0000771 http://purl.obolibrary.org/obo/NCIT_C3073 Enlargement of the breast in the males, caused by an excess of estrogens. Physiological gynecomastia is normally observed in newborns; adolescent; and aging males. Note that breast growth as a result of hormone-replacement therapy (HRT) in transfeminine persons is, by definition, not gynecomastia as these persons are not male. O/E - gynecomastia gynaecomastia idiopathic gynecomastia The Complete Dictionary of Sexology