Thanks for your query.
As you know, cancers mostly are detected during the late stages as in your father's case. The swelling in the feet and bilirubin levels are due to the liver damage
. According to what you said, he is very weak due to the toxicities of chemotherapy
and moreover due to the disease process itself.
Varying treatment modalities are advised by various doctors as there is no treatment which can offer a very high success rate.
I would suggest to give him more nutritious food which contain high vitamins and minerals
, more fruit juice and nutritional supplementation. This would improve his general health and immunity to a better state than now. The aim of treatment for now should be more on improvement of quality of life rather than the quantity of life. There are also new modalities of complementary therapies like Dendritic Cell
Therapy, which is one type of Immunotherapy
Hope I have answered your question. If you require any further assistance please let me know. Thank you.