- To establish a preliminary assessment whether toxicity rates are acceptable in patients with locally advanced intra or extrahepatic cholangiocarcinoma when treated with a regimen of gemcitabine every two weeks and continuous fluorouracil (5-FU) given concurrently with external beam radiation therapy to a total dose of 45 gray(Gy), followed by a brachytherapy or Stereotactic Body Radiation Therapy(SBRT) boost.