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 ComputedNeoplasm InvasivenessPseudomyxoma PeritoneiClaudin-4Precancerous ConditionsRetrospective StudiesFixativesOsteonectinImmunohistochemistryTumor Markers, BiologicalAdenomaCystadenocarcinomaTreatment OutcomeAdenocarcinomaMagnetic Resonance ImagingNeoplasm StagingCarcinoma, Intraductal, NoninfiltratingIncidencePrognosisCystadenomaAppendixDiverticulumBile Duct NeoplasmsPeritoneal NeoplasmsNipplesCarcinoma, Ductal