PancreaticoduodenectomyPancreatic NeoplasmsPancreatectomyHeadPancreaticojejunostomyPancreasPancreatitis, ChronicDuodenal NeoplasmsPancreatic DiseasesPancreatitisAmpulla of VaterHead and Neck NeoplasmsPancreatic PseudocystMesenteric VeinsCarcinoma, Pancreatic DuctalCholangiopancreatography, Magnetic ResonanceDuodenumJejunostomyCommon Bile Duct NeoplasmsJaundice, ObstructivePancreatic FistulaEndosonographyAdenocarcinomaJaundicePancreatic DuctsTomography, X-Ray ComputedCA-19-9 AntigenCholangiopancreatography, Endoscopic RetrogradePancreatic CystRetrospective StudiesEarly Detection of CancerTreatment OutcomePancreatitis, AlcoholicNeoplasm InvasivenessCongenital HyperinsulinismPalliative CareNeoplasm StagingHead MovementsFollow-Up StudiesPreoperative CareAdenocarcinoma, MucinousSurvival RatePrognosisSurvival AnalysisFemur HeadProspective StudiesProstatic NeoplasmsDrainageBile Duct NeoplasmsOvarian NeoplasmsLiver NeoplasmsBreast NeoplasmsDeoxycytidineLung Neoplasms