Biliary Stenting With or Without Photodynamic Therapy in Treating Patients With Locally Advanced, Recurrent, or Metastatic Cholangiocarcinoma or Other Biliary Tract Tumors That Cannot Be Removed by Surgery

Biliary Stenting With or Without Photodynamic Therapy in Treating Patients With Locally Advanced, Recurrent, or Metastatic Cholangiocarcinoma or Other Biliary Tract Tumors That Cannot Be Removed by Surgery