Adenocarcinoma, MucinousCarcinoma, Pancreatic DuctalNeoplasms, Cystic, Mucinous, and SerousAdenocarcinoma, PapillaryCarcinoma, PapillaryPancreatic NeoplasmsPancreatic CystPancreatectomyCystadenoma, SerousCystadenoma, MucinousCyst FluidCholangiopancreatography, Magnetic ResonancePancreatic JuicePancreaticoduodenectomyCystadenocarcinoma, MucinousEndosonographyMucin-2Pancreatic DuctsIndianaNeoplasms, Multiple PrimaryPapilloma, IntraductalPancreasMucinsCarcinoma in SituAppendiceal NeoplasmsCholangiopancreatography, Endoscopic RetrogradeTomography, X-Ray ComputedPseudomyxoma PeritoneiClaudin-4Neoplasm InvasivenessPrecancerous ConditionsRetrospective StudiesFixativesOsteonectinImmunohistochemistryTumor Markers, BiologicalAdenomaCystadenocarcinomaAdenocarcinomaTreatment OutcomeMagnetic Resonance ImagingNeoplasm StagingCarcinoma, Intraductal, NoninfiltratingPrognosisCystadenomaAppendixDiverticulumBile Duct NeoplasmsPeritoneal NeoplasmsNipplesCarcinoma, Ductal