JulieAnn
I do both Yoga and Pilates regularly at my gym. I even kept doing Yoga and Pilates the first three weeks of my radiation TX the first time. IMO they are both excellent rehabilitation exercises for cancer patients. Like yourself, my RO recommended yoga as did my MO and ENT surgeon. I personally like the Pilates better since it does not have so many "pretzel" shapes.
Don't forget some weight lifting, hand weights are good to start off with as well as the exercise machines.
My understanding is that many OCF members do Yoga and find it very helpful.
Hope this helps
Charm