Andrea,
If this cancer comes back it is unforgiving. No one here can tell you that you need to get radiation, but if your doctor is telling you to save anything for a reoccurrence, get a second opinion. We all throw the second opinion thing around like we expect you to shop for the answer you want to hear, not so. You need to be sure that your doctor is making the decision based on you situation. You need to see ALL 3 oncologists, surgeon, medical and radiation. You need a full team of doctors to make the recommendations, not a doctor that will do what you want. I understand you work at the hospital and I'm sure that is why they will do what you want, you need a doctor that will do what you need. Just so you know, the side effects of radiation have not been too bad, and I had standard radiation 3 years ago. If needed, you would probably get IMRT, I hear it is the way to go nowadays.
Glenn