Vascular NeoplasmsHemangioendotheliomaHemangioendothelioma, EpithelioidNeoplasms, Vascular TissueHemangiomaHemangiosarcomaCell ProliferationPancreatic NeoplasmsNeoplasmsCells, CulturedSignal TransductionCell DivisionImmunohistochemistryCell DifferentiationApoptosisCell Line, TumorNeoplasms, Cystic, Mucinous, and SerousCell CycleSkin Neoplasms