<s>[INST] Hello Doctor,My father is having hilar cholangiocarcinoma and undergone surgery and removed the tumor. But doctors told that it has spread to lyphnodes. Before surgery he never had abdminal pain or pale color stool but today we noticed both and he is having stomach pain too. Please tell me your opinion [/INST] Pale colored stool can be due to obstructive jaundice. Is he jaundiced? (yellowish discoloration of eyes, skin). His LFTs liver function tests will confirm it.At what location were the lymph nodes involved. If the lymph nodes are local then chemo-radiotherapy may benefit him. Otherwise palliative chemotherapy should be given to him.I hope it helps.Please discuss it with your oncologist. </s>