GynecomastiaPostmenopauseBreastOsteoporosis, PostmenopausalEstrogen Replacement TherapyBreast NeoplasmsEstrogensMenopauseTamoxifenBreast DiseasesPremenopauseBreast Neoplasms, MaleReceptors, EstrogenEstradiolAromatase InhibitorsRisk FactorsCarcinoma, Ductal, BreastEstroneEstrogens, Conjugated (USP)Bone DensityWomen's HealthAntineoplastic Agents, HormonalReceptors, ProgesteroneMammographyHormone Replacement TherapyNitrilesCase-Control StudiesKlinefelter SyndromeTriazolesReceptor, erbB-2Estrogen AntagonistsHypogonadismCell Line, TumorFeminizationBone Density Conservation AgentsTestosteroneSex Hormone-Binding GlobulinAromatasePrognosisIsoflavonesSelective Estrogen Receptor ModulatorsMedroxyprogesterone AcetateRaloxifeneProspective StudiesChemotherapy, AdjuvantCohort StudiesFollow-Up StudiesRiskProgestinsGene Expression Regulation, NeoplasticNeoplasm MetastasisTumor Markers, BiologicalNeoplasm InvasivenessAge FactorsNeoplasms, Hormone-DependentAntineoplastic AgentsDouble-Blind MethodIncidenceWomenHot FlashesGonadal Steroid HormonesAngiomatosisRisk AssessmentCarcinoma, LobularTime FactorsMammary Glands, HumanTreatment OutcomeMastectomy