I am glad to hear that your cancer was discovered relatively early and I'm hoping that means successful treatment. Unfortunately, I am familiar with Ewing's Sarcoma and understand the severity of your disease.
I had lung cancer and lost my right lung almost 4 yrs ago. The chemo was much harder on me than the surgery, but MJ made a big difference, particularly with appetite and nausea.( Being stoned also made me feel better in general, as well as improving my attitude. It can't be measured, but it counts just the same.)
Getting high when you're sick isn't the same as tokin' up and enjoying the buzz as usual- it's difficult to enjoy anything when you're ill- but it does help with the way you feel, and I'll by God drink to that.