Breast DiseasesFibrocystic Breast DiseaseBreastFibroadenomaBreast NeoplasmsAdenofibromaCarcinoma, Ductal, BreastMammographyHyperplasiaCarcinoma, Intraductal, NoninfiltratingBreast CystNipplesMenopauseCarcinoma in SituPrecancerous ConditionsCarcinoma, LobularRisk FactorsBiopsy, NeedleBiopsyCase-Control StudiesReceptors, EstrogenUltrasonography, MammaryBreast FeedingPalpationMastitisReceptors, ProgesteroneMastectomyTumor Markers, BiologicalNeoplasm InvasivenessAge FactorsRiskPostmenopauseEstrogensParityProspective StudiesBreast Neoplasms, MaleMenstruationCarcinomaPremenopauseBody FluidsPrognosisMenarcheImmunohistochemistryNeoplasm MetastasisCohort StudiesEstrogen Replacement TherapyCell Line, TumorBreast ImplantsOdds RatioCathepsin DReceptor, erbB-2Lymphatic MetastasisRisk AssessmentBreast Self-ExaminationProportional Hazards ModelsNeoplasm StagingSensitivity and SpecificityNeoplasm ProteinsIncidenceTime FactorsTamoxifenProgestinsMass ScreeningConfidence IntervalsOutpatient Clinics, HospitalFollow-Up Studies