Dear Leighcrwfrd.
Thank you for for your quiry. Yor father has became an advancced case of cholangiocarcinoma and because of this he has cholestasis , a form of obstructive Jaundice. I am sory to convey you that he is likely to undergo hepatic coma with deepening of jaundice.
I do not think chemotherapy at this point has a good role as the liver is not functioning well. So chemotherapy will be more harmful to him.
You are advised to see your primary physician for his symptomatic terminal care and possible comforting management and pray his peace.
I hope you understood me and bear with me .
Truly,
Dr. Ticku

I am very sorry to hear about your boss. He does have an advanced stage of bile duct cancer, for which there are very limited treatment options available. If he is developing jaundice (yellowish discoloration of his eyes), you can consult a doctor and get a stenting of his duct done. This will reduce the jaundice and he will feel better.
It is extremely difficult to predict how long he is going to live, but what is important is that he should be made as comfortable as possible and his symptoms should be adequately dealt with.

Dear Leighcrwfrd,

Thanks for your query.
You and all well wisher of your Boss should support and motivate him for proper treatment. To minimize the ill-effect of jaundice on liver and remaining body, stent (tube) may be placed across the blockage of bile-duct cancer to facilitate bile flow to intestine. So jaundice, itching will be controlled.
Surgery is best treatment as it removes tumor from body, provided tumor is well localised and this is assessed on CECT or MRI of abdomen.
To prevent further progression of tumor, usually chemotherapy is advised but unfortunately in they have only small benefit compared to cancer of another organs. Newer chemotherapy drug are used in clinical trial with some more better results. To participate in trial, patient and family should be well motivated.
With regards