ChemopreventionAnticarcinogenic AgentsSulindacPrecancerous ConditionsIsothiocyanatesCarcinogensEflornithineIsotretinoinAnti-Inflammatory Agents, Non-SteroidalCatechinAzoxymethaneNeoplasmsTeaRetinoidsPolyphenolsCyclooxygenase 2 InhibitorsEtretinateCurcuminLeukoplakiaColonic NeoplasmsAntineoplastic AgentsChlorophyllidesPlant ExtractsTamoxifenFenretinideCyclooxygenase 2Organoselenium CompoundsPiroxicamThiocyanatesPyrazolesRaloxifeneFinasterideSelective Estrogen Receptor ModulatorsCyclooxygenase InhibitorsProstatic NeoplasmsSilymarinMethylnitrosoureaApoptosisPunicaceae9,10-Dimethyl-1,2-benzanthraceneAdenomatous Polyposis ColiAntioxidantsLung NeoplasmsSulfonamidesAntimutagenic AgentsSelenium CompoundsColorectal NeoplasmsClinical Trials as TopicRats, Inbred F344Breast Neoplasms5-alpha Reductase InhibitorsAnethole Trithione4-Nitroquinoline-1-oxideSkin NeoplasmsChalconesPhytotherapybeta CaroteneAdenomaAzasteroidsSelenomethionineMouth NeoplasmsDietAspirinPhenolsIntestinal PolypsCell Transformation, NeoplasticSeleniumMammary Neoplasms, ExperimentalTertiary PreventionProstaglandin-Endoperoxide SynthasesNitrosaminesIntestinal NeoplasmsRespiratory Tract NeoplasmsCell ProliferationGarlicPolyaminesFlavonoidsAberrant Crypt FociTumor Markers, BiologicalStilbenesLeukoplakia, OralCarotenoidsHesperidinOrnithine DecarboxylasePlacebosBenzo(a)pyreneMilk ThistleAllyl CompoundsCell Line, TumorCarcinoma, Basal CellUrethaneDose-Response Relationship, DrugAflatoxin B1KeratosisCarcinoma, Squamous CellBiflavonoidsAdenocarcinomaKeratosis, ActinicVitamin ANF-E2-Related Factor 2