Carcinoma, NeuroendocrineAdenocarcinomaNeuroendocrine TumorsCarcinoma, Large CellCarcinoid TumorCarcinomaNeurosecretory SystemsCarcinoma, Merkel CellLung NeoplasmsCarcinoma, Small CellImmunohistochemistryCarcinoma, Squamous CellNeoplasms, Complex and MixedChromograninsPancreatic NeoplasmsNeuroendocrine CellsTumor Markers, BiologicalNeoplasms, MesothelialCommon Bile Duct NeoplasmsSynaptophysinChromogranin AFatal OutcomeAmpulla of VaterGastrointestinal NeoplasmsCarcinoma, HepatocellularLiver NeoplasmsThymus NeoplasmsParanasal Sinus NeoplasmsNeoplasms, Multiple PrimaryPrognosisStomach NeoplasmsBronchial NeoplasmsNeoplasm StagingLaryngeal NeoplasmsAdenocarcinoma, MucinousGallbladder NeoplasmsIleal NeoplasmsCarcinoma in SituTomography, X-Ray ComputedEsophageal NeoplasmsAnal SacsOctreotideTreatment OutcomeCarcinoma, MedullaryRetrospective StudiesTissue Array AnalysisImmunoenzyme TechniquesNeoplasm InvasivenessLymphatic MetastasisCarcinoma, PapillaryBiliary Tract NeoplasmsEnterochromaffin CellsAdenocarcinoma, PapillaryNeoplasm MetastasisBiopsyCarcinoma, Pancreatic DuctalNose NeoplasmsPancreaticoduodenectomyCell Line, TumorEtoposideAdenocarcinoma, Bronchiolo-AlveolarKeratinsSurvival AnalysisCombined Modality TherapySurvival RateGene Expression Regulation, NeoplasticCisplatinColonic NeoplasmsUterine Cervical NeoplasmsKaplan-Meier EstimateBarrett EsophagusCarcinoma, Ductal, BreastAntineoplastic Combined Chemotherapy ProtocolsLoss of HeterozygosityTumor Cells, CulturedAntineoplastic AgentsNeoplasm Recurrence, LocalCat DiseasesSkin NeoplasmsBreast NeoplasmsCarcinoma, Basal CellMediastinal NeoplasmsCalcitoninGenes, p16Disease-Free SurvivalTumor Suppressor Protein p53Head and Neck NeoplasmsNeuroendocrine Secretory Protein 7B2Intestinal NeoplasmsCarcinoma, BronchogenicCardiaCarcinoma, EndometrioidHistological Techniques