Neuroendocrine TumorsAppendiceal NeoplasmsCarcinoma, NeuroendocrineAppendixCarcinoid TumorPancreatic NeoplasmsChromogranin AGastrointestinal NeoplasmsCecal DiseasesMucoceleAppendectomyPseudomyxoma PeritoneiAppendicitisLIM-Homeodomain ProteinsTumor Markers, BiologicalCystadenoma, MucinousNeurosecretory SystemsNeuroendocrine CellsPeritoneal NeoplasmsAdenocarcinoma, MucinousFecal ImpactionAdenoma, VillousChromograninsCecal NeoplasmsDiverticulitisIleal NeoplasmsIntestinal PerforationHyperthermia, InducedChemotherapy, Cancer, Regional PerfusionAbdomen, AcuteAbdominal AbscessIntussusceptionNeoplasms, Multiple PrimaryIntestinal ObstructionImmunohistochemistryNeuroendocrine Secretory Protein 7B2Tomography, X-Ray ComputedRupture, SpontaneousColonoscopyAbscessNeoplasmsNucleosome Assembly Protein 1SynaptophysinNeoplasms, Cystic, Mucinous, and SerousCarcinoma, Signet Ring CellOctreotideAbdominal PainLung NeoplasmsRetrospective StudiesAdenocarcinomaLaparoscopyInfusions, ParenteralIntestinal NeoplasmsColectomyEndocrine Gland NeoplasmsDigestive System NeoplasmsDiverticulumSkin NeoplasmsReceptors, SomatostatinCarcinoma, Large CellMitomycinOvarian NeoplasmsLiver NeoplasmsHypothalamo-Hypophyseal SystemThyroid NeoplasmsHypothalamusCombined Modality TherapyTreatment OutcomeCarcinomaPrognosisNeoplasms, Complex and MixedSomatostatinChromogranin BCarcinoma, Small CellBronchial NeoplasmsKidney NeoplasmsNeoplasms, Second PrimaryNervous System NeoplasmsMucins