The reason for waiting is to see if the tumor grows. ou could have had that tumor for 20 years and it hasn't grown a bit and maybe never will. Treatment for AN's is not about improving symptoms, it's about necessity. In many cases, the tumor must be arrested or removed or death will ultimately result. In many cases the tumor will NOT cause death and treating it WILL NOT improve symptoms. The surgery or radiation itself very often worsens symptoms.
I feel for people with 3cm AN's that simply have to have the rumor removed and have no choice. I also don't understand those with small tumors who rush to have them removed because they are under the impression that somehow removing it will improve their balance and tinnitus issues.
Look at the complications experienced by many of our members. They suffer from headaches, tinnitus, hearing loss, balance issues, and regrowth of tumors. Some of them had no choice. You can't watch and wait when a tumor is blacking the flow of your C/S fluid and they had to have surgery. The complications of the surgery are a better choice than the death they were facing. However, IF you have a small tumor, there is a very good chance that you will never feel as good post surgery as they day before the surgery.