Hola,
I had heard that too and talked to the Anesthesiologist about it before I had a hysterectomy. I don't remember exactly the risks, but there is things they watch for with MS Patients. Sorry, I don't remember exactly what though. I would be sure you tell your anesthesiologist that you have MS. He did give me the option of just having a spinal and not going to sleep, but I choose to go to sleep. The general anesthesia went fine for me, no problems at all, except I was so so naseauated after I work up, which is a very normal side effect. Good luck!
Kathy