HI Susan,
I too had GK. and now 2 and a half years later it is bigger. Like you, my doc seems unconcerned. But I had GK with Dr. Lunsford at UPMC who is considered the best of the best... so I try to just have faith in his comments, but truly I know it is worrisome.
It seems like you are 3 years out from GK, and I know the tumors can swell and up to 3 years is not unusual... so I have been told by Dr. Lunsford. (since I am 2.5 years out and he just told me to come back in two years, even though it is bigger now!)
I don't know who did your GK, but I would for sure send to Dr. Lunsford since he is the leading authority. I know that he has done GK on people for a second time, so that is not unheard of. I think they also do surgery there for ANs, so he knows both sides of it. Still, I know of one person on this forum that did not have her tumor stabilize for four years.
If you send a letter and a copy of your last MRI and ask for a consult to see if he thinks you should do the GK again (and are considering him and UPMC) I'm sure he will respond. So yes, I would think a second opinion is a good thing, but it depends on who is giving the second opinion.
Here is the info to send a letter and copy of your MRI to Dr. Lunsford for a second opinion. You might as well ask the guy who is the world authority, right?
Dr. Lunsford
200 Lothrop St.
Suite F188
Pittsburgh, PA 15213
412-647-6781
I hope this helps!
Cathy