Liver cancer is caused by a fear if Lack, that means that he may feel a lack of money or friendships. Orientals with liver cancer often get it from a lose and lack of honor or respect.
These conflicts are sometimes self resolved and the cancer starts breaking down with infections and fevers.
Your father dying so very quickly indicates to me that he had a severe fear/shock of the diagnosis; he may have just given up. The reason I believe this because his failing kidneys indicate a conflict of "all is lost, nothing can help".