In Portland, Oregon, the Oregon Health & Science University Cancer Center has been a site for trials of Gleevec and other drug treatments.
Here is the link to the main page of their website: http://www.ohsucancer.com/
The physicians who have lots of experience with GIST include:
Medical Oncologists
Dr. Heinrich
Charles Lopez, MD PhD
Surgeons
Kevin Billingsley, MD
Clifford Devenney, MD
....Oregon Health Science University Cancer Institute (OHSU) is one of the premier GIST treatment (and research) centers in the world .. and one of the top four in the USA. If your insurance would cover your going there .. even as a second opinion .. I'd keep that in mind.
We go to Dr. Lopez @ OHSU and he's wonderful. I hope he's not going anywhere or we'll have to move with him!
GIST Support Wiki