Ampulla of VaterCommon Bile Duct NeoplasmsPancreaticoduodenectomyFallopian TubesDuodenal NeoplasmsDuodenoscopyCholangiopancreatography, Endoscopic RetrogradeDuodenoscopesCommon Bile Duct DiseasesCarcinoma, Signet Ring CellAnus, ImperforateBile Duct NeoplasmsJaundiceBiliary Tract NeoplasmsDuodenumSperm TransportAdenoma, VillousPancreatic DuctsKrukenberg TumorGallstonesAdenocarcinomaCarcinoid TumorCommon Bile DuctCarcinoma, NeuroendocrineDuodenal DiseasesOvum TransportKeratin-7Neoplasms, Multiple PrimaryBiliary Tract Surgical ProceduresHair Cells, AmpullaEndolymphSemicircular CanalsPancreatic Neoplasms