how can i help my dad?

Hey guys! Sorry I know I haven’t been posting lately but I’ve been reading others posts to keep myself updated on anything that’s working.

Some of you may know that my dad had 6 rounds of 5fu/Cisplatin which didn’t decrease the mass but kept him stable. The tumor is 19cm on his liver, and there’s also some small ones on his lungs. My dad’s now having carboplatin/gemzar for chemo, and he’s planning to stop after four rounds if there’s no progress… is that wise to do?

Say if his tumor mass shrunk after four rounds of chemo, is it best to keep up with chemo or do a surgery (the doc mentioned that my dad’s tumor is located on the edge of his liver)? Any suggestion would be much appreciated, thanks!!