title: Newly identified estrogen source may give clues to breast tumor development.
mesh_terms: D001940:Breast / Q000378:metabolism; D001943:Breast Neoplasms / Q000378:metabolism*; D004967:Estrogens / Q000096:biosynthesis*; D005260:Female; D006801:Humans; D009376:Neoplasms, Hormone-Dependent / Q000378:metabolism*
chemical_list: D004967:Estrogens