Dear Your adopted son already having been diagnosed as bile duct cancer, surgery will be the best option if found feasible by your Onco surgeon. This has to be followed if necessary by local radiation therapy and systemic chemotherapy. If surgery does not leave any residual disease then only systemic adjuant chemotherapy may be considered. The clear understanding will be there when we have post surgical and pathological details. Surgery is the best option. if the disease is completely resected out he may need adjuant systemic chemotherapy. If residual disease was left after surgery ne may need external radiotherapy as wel. Post surgical and histopathological details will give understanding about the further course of action. Following the advice of your treating doctor will be the best help to your son. Non fatty foods and palatable liquid diets may be suitable for him. I wish your son best of luck and quick recovery. Dr. J. Ticku