A scary question but need to know..

This is the latest from Kathy:

Pray for ray, he has not been feeling as good as he wants..his liquid diet is not satisfying to him..we have everything on that diet but he says it's not filling...keep praying

The doctor said that the opening for Jr to get anything down is so very narrow, that only clear liquids can get down.
The tumor is large and the way the tumor has grown Jr's esophagus is like a narrow winding road.

My question is can this tumor completely close what opening he has left???
Then what would he do???

How can he possibly go through any future chemo with only liquids????