Patients with liver predominant cholangiocarcinoma or pancreatic cancer will be considered for the trial. The patients wre being treated in groups of thre patients. Each three patients receive a pre-specified dose of gemcitabine with full dose radioembolization using theraspheres. If no significant side effects are observed then three additional three patients will be treated with a higher dose of gemcitabine. The purpose to identify the highest dose of gemcitabine that can be safely combined with theraspheres.