FluorouracilPyrimidinesPyrimidine NucleotidesPyrimidine DimersPyrimidine NucleosidesLeucovorinAntimetabolites, AntineoplasticAntineoplastic Combined Chemotherapy ProtocolsDihydrouracil Dehydrogenase (NADP)UracilOrganoplatinum CompoundsThymidylate SynthaseDrug Administration SchedulePyrimidine PhosphorylasesFloxuridineCisplatinOrotate PhosphoribosyltransferaseColorectal NeoplasmsDeoxyribonuclease (Pyrimidine Dimer)Orotic AcidInfusions, IntravenousUridineMethotrexateCamptothecinUridine PhosphorylaseUltraviolet RaysChemotherapy, AdjuvantAdenocarcinomaFluorodeoxyuridylateEpirubicinPurinesColonic NeoplasmsCombined Modality TherapyDihydroorotaseDeoxyribodipyrimidine Photo-LyaseAntimetabolitesTreatment OutcomeTegafurCyclophosphamideDeoxyuridinePentosyltransferasesDeoxycytidineMitomycinPhosphoribosyl PyrophosphateCytidineBromouracilAspartate CarbamoyltransferasePurine NucleotidesUridine KinaseSurvival AnalysisAntineoplastic AgentsSemustineUracil NucleotidesDisease-Free SurvivalCarbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)Orotidine-5'-Phosphate DecarboxylaseStomach NeoplasmsThymineDoxorubicinRectal NeoplasmsLevamisoleNucleosidesDihydroorotate OxidaseNeoplasm MetastasisPhosphonoacetic AcidUridine TriphosphateDNA RepairBreast NeoplasmsDose-Response Relationship, DrugDNAFlucytosineSurvival RateInfusions, Intra-ArterialDrug SynergismThymidine PhosphorylaseLiver NeoplasmsStomatitisUridine MonophosphateLevoleucovorinDeoxyuracil NucleotidesPurine-Pyrimidine Metabolism, Inborn ErrorsDihydropyrimidine Dehydrogenase DeficiencyPurine NucleosidesAntidotesThymidineDeoxyribonucleosidesCarcinoma, Squamous CellChronotherapyTaxoidsProdrugsHead and Neck NeoplasmsBase SequenceKineticsEsophageal NeoplasmsLeukopeniaDrug Resistance, NeoplasmNeoplasm StagingCytosine DeaminaseMucositisNeutropenia