My best wishes to you and your son.. The call to Dr. Druey was absolutely an excellent path to take. I see you are from Minnesota. While Dr. Greipp has retired from the Mayo Clinic, they would at least have the most experience in the state. I was diagnosed there. I am also from MN. Now live in North Carolina. While children may need different care, maybe IVIG may be a course of action for your grandson.
Keep us posted and if you need support, please reach out.'
Marc