Breast NeoplasmsBreastCell Line, TumorReceptors, EstrogenCarcinoma, Ductal, BreastGene Expression Regulation, NeoplasticTamoxifenReceptor, erbB-2Tumor Cells, CulturedReceptors, ProgesteroneNeoplasm InvasivenessNeoplasm MetastasisMCF-7 CellsBreast DiseasesMice, NudeNeoplasm ProteinsMammary Neoplasms, ExperimentalEstrogen AntagonistsAntineoplastic AgentsTumor Markers, BiologicalEstrogen Receptor alphaEstrogensPrognosisCell ProliferationNeoplasms, Hormone-DependentEstradiolMammographyCell DivisionAntineoplastic Agents, HormonalRNA, MessengerDrug Resistance, NeoplasmImmunohistochemistryCarcinoma, Intraductal, NoninfiltratingApoptosisTransplantation, HeterologousNeoplasm TransplantationReverse Transcriptase Polymerase Chain ReactionCarcinoma, LobularCarcinomaMammary Glands, HumanNeoplasm StagingBreast Neoplasms, MaleGene Expression ProfilingGenes, erbB-2MastectomyGenes, BRCA1Blotting, WesternDNA, NeoplasmSignal TransductionEarly Detection of CancerXenograft Model Antitumor AssaysEstrogen Receptor ModulatorsLymphatic MetastasisPostmenopauseRisk FactorsMammary Neoplasms, AnimalChemotherapy, AdjuvantRNA, Small InterferingAntineoplastic Combined Chemotherapy ProtocolsSurvival AnalysisTransfectionCell CycleBRCA1 ProteinPremenopauseFibrocystic Breast DiseaseCell MovementDisease ProgressionGenetic Predisposition to DiseaseRNA, NeoplasmDisease-Free SurvivalBreast FeedingDown-RegulationMenopauseCase-Control StudiesCell Growth ProcessesCell Transformation, NeoplasticOvarian NeoplasmsNeoplasm Recurrence, LocalTime FactorsLung NeoplasmsCarcinoma, DuctalBRCA2 ProteinAromatase InhibitorsBone NeoplasmsFollow-Up StudiesCell SurvivalSurvival RateBreast Self-ExaminationOligonucleotide Array Sequence AnalysisRiskTumor Suppressor Protein p53Promoter Regions, GeneticReceptor, Epidermal Growth FactorAntibodies, MonoclonalDose-Response Relationship, DrugNeoplasmsMutationMice, SCIDGene AmplificationEpithelial Cells