Cystadenoma, MucinousAdenocarcinoma, MucinousCystadenomaAppendiceal NeoplasmsCystadenoma, PapillaryMucoceleCystadenoma, SerousAdenocarcinomaCystadenocarcinomaAppendixCystadenocarcinoma, MucinousCarcinoma, Signet Ring CellPseudomyxoma PeritoneiCecal DiseasesRetroperitoneal NeoplasmsOvarian NeoplasmsRectal FistulaPancreatic NeoplasmsCecal NeoplasmsNeoplasm MetastasisUrachal CystTomography, X-Ray ComputedCalymmatobacteriumPerineumMucin-2Colorectal NeoplasmsLymphatic MetastasisStomach NeoplasmsNeoplasm StagingMucinsImmunohistochemistryTumor Markers, Biological