Adenocarcinoma, MucinousAppendiceal NeoplasmsPseudomyxoma PeritoneiRectal FistulaCecal NeoplasmsCystadenoma, MucinousUrachal CystCalymmatobacteriumPerineumCystadenocarcinoma, MucinousMucin-2MucinsStomach NeoplasmsNeoplasm StagingOvarian NeoplasmsImmunohistochemistryTumor Markers, BiologicalPrognosisColonic NeoplasmsRectal NeoplasmsMicrosatellite InstabilityLung NeoplasmsKaplan-Meier EstimatePancreatic NeoplasmsEsophageal NeoplasmsAdenocarcinoma, PapillaryBarrett EsophagusCarcinoma, Pancreatic DuctalAdenocarcinoma, Bronchiolo-AlveolarBiopsySensitivity and SpecificityRetrospective Studies