Adenocarcinoma, MucinousAdenocarcinomaAppendiceal NeoplasmsCarcinoma, Signet Ring CellColorectal NeoplasmsPseudomyxoma PeritoneiPrognosisRectal FistulaCecal NeoplasmsCystadenoma, MucinousUrachal CystCalymmatobacteriumPerineumCystadenocarcinoma, MucinousMucin-2Neoplasm StagingMucinsTumor Markers, BiologicalStomach NeoplasmsColonic NeoplasmsRectal NeoplasmsImmunohistochemistryOvarian NeoplasmsMicrosatellite Instability