I wish I had come to Mayo first! I am in a similar situation. My 5cm mass is where sigmoid and rectum connect. I also have spots on my liver and lymph nodes near tumor. I’ve been thru 8 rounds of Folfox chemo (4 months) then 27day of radiation/chemo (xeloda) combo. Protein shakes have been a must for me. I don’t always have an appetite or can consume many calories . I’m 47 and was diagnosed in march of this year. I’m no expert by any means but will gladly share what I know.