I too was told that my avm was inoperable because of the risk of being paralyzed. After seeing 3 different doctors, I received the same answer: "just pretend you never knew about it in the first place". So, after about 2 1/2 years, I finally found avm survivors.org and was told about harborview medical center in seattle. Even though it was 1 1/2 hours away, I decided to get one last opinion. And I'm glad i did because I was able to get gamma knife treatment on January 21st of 2014.
It doesn't hurt to get a second opinion.