AdenocarcinomaPancreatic NeoplasmsEsophageal NeoplasmsLung NeoplasmsNeoadjuvant TherapyCarcinoma, Pancreatic DuctalStomach NeoplasmsAdenocarcinoma, MucinousNeoplasm StagingCombined Modality TherapyChemoradiotherapy, AdjuvantPancreaticoduodenectomyPancreatectomyChemotherapy, AdjuvantPrognosisRadiotherapy, AdjuvantAdenocarcinoma, PapillaryRectal NeoplasmsBarrett EsophagusFluorouracilAdenocarcinoma, Bronchiolo-AlveolarSurvival RateCA-19-9 AntigenCarcinoma, Squamous CellTreatment OutcomePreoperative CareTumor Markers, BiologicalEsophagogastric JunctionImmunohistochemistryEsophagectomyAntineoplastic Combined Chemotherapy ProtocolsLiver NeoplasmsNeoplasm Recurrence, LocalCisplatinColorectal NeoplasmsCardiaDeoxycytidineSurvival AnalysisColonic NeoplasmsRetrospective StudiesCarcinoma, Non-Small-Cell LungDisease-Free SurvivalAmpulla of VaterKaplan-Meier EstimateGastrectomyHepatectomyTomography, X-Ray ComputedLymphatic MetastasisGene Expression Regulation, NeoplasticCarcinoma, Acinar CellNeoplasm MetastasisCommon Bile Duct NeoplasmsNeoplasm InvasivenessAntimetabolites, AntineoplasticLeucovorinFollow-Up StudiesCarcinoembryonic AntigenAntineoplastic AgentsKeratin-7Peritoneal LavageHypopharyngeal NeoplasmsOrganoplatinum CompoundsCell Line, TumorBile Duct NeoplasmsRadiotherapy DosagePneumonectomyCarcinoma, Large Cell