Liver tumour - been told they can't operate. Why aren't they trying another course of treatment instead?

My husband has psc and uc - they have now said he has a tumour on his liver but they cant operate because of sclerosis on the liver due to the psc and he is jaundiced.  It seems they are just going to monitor him.  I am thinking should I be doing something as it seems odd to just leave it - couldnt they try chemo or something?