AdenocarcinomaAdenocarcinoma, MucinousLung NeoplasmsPancreatic NeoplasmsEsophageal NeoplasmsAdenocarcinoma, PapillaryBarrett EsophagusCarcinoma, Pancreatic DuctalStomach NeoplasmsAdenocarcinoma, Bronchiolo-AlveolarCardiaImmunohistochemistryColonic NeoplasmsTumor Markers, BiologicalPrognosisEsophagogastric JunctionNeoplasm StagingKeratin-7Treatment OutcomeCell Line, TumorGene Expression Regulation, NeoplasticCarcinoma, Squamous CellEndometrial NeoplasmsNeoplasms, Multiple PrimaryPrecancerous ConditionsSymptom AssessmentIntestinal NeoplasmsRetrospective StudiesDepressionProstatic NeoplasmsDuodenal NeoplasmsTime FactorsTumor Cells, CulturedCarcinoma, Signet Ring CellCarcinoma, EndometrioidCecal NeoplasmsMetaplasiaNeoplasm InvasivenessMammary Neoplasms, ExperimentalRisk FactorsFollow-Up StudiesAdenocarcinoma, Clear CellDisease ProgressionColorectal NeoplasmsImmunoenzyme TechniquesRectal NeoplasmsAmpulla of VaterQuestionnairesSurvival RateCommon Bile Duct NeoplasmsIleal NeoplasmsAdenomaEsophagusGenes, rasKeratin-20Tissue Array AnalysisPancreaticoduodenectomyProspective StudiesSurvival AnalysisJejunal NeoplasmsSeverity of Illness IndexNeoplasm MetastasisFatal OutcomeCarcinoma, Non-Small-Cell LungBiopsyGastroesophageal RefluxDNA, NeoplasmLymphatic MetastasisNeoplasm ProteinsCarcinoma, AdenosquamousMutationCase-Control StudiesCarcinoembryonic AntigenTomography, X-Ray ComputedCarcinoma, Acinar CellNeoplasm TransplantationAntineoplastic AgentsBehavioral SymptomsGastrectomyKaplan-Meier EstimateRNA, MessengerPsychiatric Status Rating ScalesReverse Transcriptase Polymerase Chain ReactionParanasal Sinus NeoplasmsMice, NudeCarcinoma in SituPancreatectomyGastrointestinal NeoplasmsReceptor, Epidermal Growth FactorPredictive Value of TestsAntigens, NeoplasmUterine Cervical NeoplasmsMucinsCombined Modality TherapySmokingAppendiceal NeoplasmsPrevalencePancreatic DuctsGene Expression ProfilingCell Proliferation