Friend has acoustic neuroma

[emmasmudge]

My daughter-in-law's mother was diagnosed with acoustic neuroma 3 years ago. They told her that her symptoms would probably go away in about a year. I do think she did a gamma knife treatment. Since the first onset to now, her tumor has grown. Her symptoms have never gone away and are worsened now because of the growth of the tumor. I am wondering how successful the surgery would be to have this tumor removed? Any and all suggestions or information would be greatly appreciated. She is in her seventies and otherwise healthy.