Laurie, and others who may be interested:
Stage II endometrial cancer patients probably should have radiation. Radiation is effective in preventing local recurrence. Chemotherapy can prevent distant recurrence.
Among short term effects of radiation are colitis, bladder irritation and vaginal dryness and contraction. But radiation can also cause serious long term effects. I also had Stage IIB endometrial cancer, and I had radiation treatment after surgery 11 years ago. Five years after the radiation, I began to limp very slightly. It continued to get worse, and 8 years after the radiation, I was diagnosed with late effect, radiation-induced lumbosacral plexopathy, which is nerve damage in my back. It is considered rare, is slowly progressive and has no effective treatment. Most studies of this problem only follow patients for about five years after the radiation, not long enough, IMHO, for all the cases to appear. Studies done on breast cancer patients (who sometimes have problems with weakness in their hands and arms) showed new cases appearing 30+ years after radiation.
I would certainly NOT have radiation if I had a stage I endometrial cancer because the benefits are small but the risks of side effects are just as great.