@alberth my husband went through treatment in 2012 and lost so much weight they finally put a PEG tube in because he wasn't able to swallow. I half joked that he was saving us grocery money because the liquid supplement he was prescribed didn't cost much. He just had to put that stuff down the PEG tube 3X a day.
The only issue was that after the GI doc removed the PEG when treatment was finished, he had to do esophageal dilations several times so my husband could eat solid foods again. He still lost almost 100 pounds, but he gained most of it back as he healed.