to our knowledge , this tumor is a unique clinicopathologic entity of hepatic origin , and its similarity to the pancreatic papillary cystic tumor in clinical , gross , microscopic , and ultrastructural features together with their closely related organogenesis , suggests that this tumor derives from pluripotential cells transdifferentiating toward the pancreatic acinar cells and ductular cells , with the latter being indistinguishable from intrahepatic small bile ductular epithelial cells .
C0334357
papillary cystic tumor
C0014597
epithelial cells