Carcinoma, NeuroendocrineNeuroendocrine TumorsCarcinoma, Islet CellOctreotideCarcinoma, Large CellLiver NeoplasmsGastrointestinal NeoplasmsPancreatic NeoplasmsCarcinomaNeurosecretory SystemsCarcinoid TumorNeuroendocrine CellsCarcinoma, Squamous CellCarcinoma, HepatocellularCarcinoma, Merkel CellCarcinoma, Small CellTreatment OutcomeChromograninsChromogranin AImmunohistochemistryNeoplasms, Complex and MixedSynaptophysinTumor Markers, BiologicalLung NeoplasmsNeoplasms, MesothelialCommon Bile Duct NeoplasmsCarcinoma in SituFatal OutcomeAmpulla of VaterAdenocarcinomaCarcinoma, PapillaryThymus NeoplasmsBronchial NeoplasmsLaryngeal NeoplasmsCarcinoma, MedullaryNeoplasms, Multiple PrimaryPrognosisParanasal Sinus NeoplasmsNeoplasm StagingCarcinoma, Ductal, BreastCarcinoma, Basal CellGallbladder NeoplasmsTomography, X-Ray ComputedNeuroendocrine Secretory Protein 7B2Ileal NeoplasmsNeoplasm InvasivenessRetrospective StudiesLymphatic MetastasisStomach NeoplasmsEnterochromaffin CellsCarcinoma, BronchogenicImmunoenzyme TechniquesCarcinoma, Transitional CellAnal SacsNeoplasm MetastasisBreast NeoplasmsCell Line, TumorHead and Neck NeoplasmsTissue Array AnalysisSkin NeoplasmsThyroid NeoplasmsCarcinoma, Intraductal, NoninfiltratingBiliary Tract NeoplasmsCarcinoma, Adenoid CysticBiopsyGene Expression Regulation, NeoplasticTumor Cells, CulturedSurvival AnalysisCombined Modality TherapyKeratinsEtoposideCarcinoma, LobularSurvival RateNose NeoplasmsNeoplasm Recurrence, LocalUterine Cervical NeoplasmsAntineoplastic AgentsCisplatinNasopharyngeal NeoplasmsCalcitoninAntineoplastic Combined Chemotherapy ProtocolsReceptors, SomatostatinKaplan-Meier EstimateLoss of HeterozygosityPancreaticoduodenectomyDisease-Free SurvivalMediastinal NeoplasmsDigestive System NeoplasmsCarcinoma, MucoepidermoidCarcinoma, AdenosquamousRNA, Messenger