Gina, welcome. Sounds to me that you're in good hands with your medical team. In many cases, mine included, after successful surgery they radiate the entire area to ensure that any microscopic malignant cells are killed as well. So that may be something they'll discuss with you. Radiation as you know is no picnic, but once they do the surgery they'll have a better idea, and about possible chemo too.
Oh and the nutritional liquids, Ensure and the like and the very high caloric stuff you can buy online, I forget the name right now but someone will weigh in, are great for keeping your weight up if you can't eat solids. I was on the stuff for 6 months and actually grew to like it so much that I have it once or twice a week still.
Every good thought headed your way for next week!