Fibrocystic Breast DiseaseBreast DiseasesBreastAdenofibromaBreast NeoplasmsUltrasonography, MammaryFibroadenomaMammographyCyst FluidBiopsy, NeedleBreast CystOsteoarthropathy, Secondary HypertrophicCarcinoma, Ductal, BreastCystsChinaHyperplasiaCase-Control StudiesBreast FeedingRisk FactorsBreast Neoplasms, MaleReceptors, EstrogenGenotypeCell Line, TumorBreast ImplantsReceptor, erbB-2Breast Self-ExaminationReceptors, ProgesteroneTamoxifen