Hi Paulette,
First and foremost you are doing the right thing by seeking information. We are patients on this site willing to offer our best *expert* opinions. Please present some more information about your situation--tumor size, hearing level, age. Much has been written about side effects relative to tumor size. That being said, the darn tumors are individual and can present varying degrees of trickiness.
The most important thing you can do is find an experienced doctor for any treatment you seek: radiation or surgery. YOu want one with at least a minimum of 100 AN treatments under his/her belt.
There are several postings under "Microsurgical Options* that you should read if you consider surgery.
There are also posts under the other treatment types as well. Have fun navigating this site and other links that you find relative to institutions etc.
Perhaps the best known one in the US is House Ear Institute at
www.hei.org.
Best of luck on your journey,
Kate