CarcinogensCarcinogenesisCell Transformation, NeoplasticCocarcinogenesis9,10-Dimethyl-1,2-benzanthracenePrecancerous ConditionsAzoxymethaneAnticarcinogenic AgentsPapillomaRats, Inbred F344Skin NeoplasmsMethylnitrosoureaColonic NeoplasmsCarcinogenicity Tests1,2-DimethylhydrazineNeoplasms, ExperimentalNitrosaminesMammary Neoplasms, ExperimentalGene Expression Regulation, NeoplasticStomach NeoplasmsAdenocarcinomaAdenoma4-Nitroquinoline-1-oxideNeoplasms, Radiation-InducedLiver Neoplasms, ExperimentalCarcinoma, Squamous CellDiethylnitrosamineNeoplasmsButylhydroxybutylnitrosamineCarcinogens, EnvironmentalDimethylhydrazinesMethylnitronitrosoguanidineBenzo(a)pyreneGenes, rasImmunohistochemistryColorectal NeoplasmsHyperplasiaMesocricetusCell Line, TumorMouth NeoplasmsDNA MethylationCyclooxygenase 2ChemopreventionLung NeoplasmsLiver NeoplasmsColonCell ProliferationCarcinomaApoptosisMice, TransgenicIntestinal NeoplasmsCell DivisionDNA AdductsAzaserineTumor Suppressor Protein p53DNA DamageKeratinocytesReverse Transcriptase Polymerase Chain ReactionUrethaneUrinary Bladder NeoplasmsTumor Markers, BiologicalMutagensMutation2-AcetylaminofluoreneRNA, MessengerEsophageal NeoplasmsDisease Models, AnimalGenes, Tumor SuppressorSignal TransductionMice, Inbred SENCARDNA, NeoplasmDisease ProgressionGenes, p53Epithelial CellsDietMutagenicity TestsGastric MucosaUltraviolet RaysMice, HairlessBenz(a)Anthracenesbeta CateninIntestinal MucosaPancreatic NeoplasmsProstatic NeoplasmsCarcinoma, HepatocellularMethylhydrazinesNeoplasm ProteinsMammary Neoplasms, AnimalLiverSkinCarcinoma in SituTetradecanoylphorbol AcetateUterine Cervical NeoplasmsDimethylnitrosamineEpidermisCheekMammary Glands, AnimalMice, Inbred C57BLAberrant Crypt FociDeoxyguanosine