I lost 70lbs altogether during treatment and then after surgery going from a solid 210 lbs to 140. I'm 3 years out of treatment and I'm just now starting to get some of that weight back on me, a very solid 175 at the moment.

I'll never get back the rest of that weight, I can't keep enough calories going in me to sustain it anyway even with 6 cans of Ensure Plus a day with MuscleMilk Protien powder mixed in (adds 27g of protien and 140 calories per scoop!). High protien will help keep the lean muscle mass from withering away, it does make it thick though so I use milk to thin it out.