Adenocarcinoma, MucinousAdenocarcinomaAppendiceal NeoplasmsCarcinoma, Signet Ring CellPseudomyxoma PeritoneiPrognosisRectal FistulaCecal NeoplasmsCystadenoma, MucinousUrachal CystCalymmatobacteriumPerineumCystadenocarcinoma, MucinousMucin-2Colorectal NeoplasmsMucinsNeoplasm StagingStomach NeoplasmsImmunohistochemistryTumor Markers, BiologicalOvarian NeoplasmsColonic NeoplasmsRectal NeoplasmsMicrosatellite InstabilityKaplan-Meier EstimateLung NeoplasmsEsophageal NeoplasmsPancreatic NeoplasmsAdenocarcinoma, PapillaryBarrett EsophagusCarcinoma, Pancreatic DuctalAdenocarcinoma, Bronchiolo-AlveolarRetrospective Studies