I have issues with eggs as well, Vegmom. Even when they are baked in something, so my family just never put them in foods if I was going to eat them. And I also have issues with nuts, but not all of them. I cannot eat Cashews, Almonds or Walnuts, but don't have problems with any other nuts. Although my doctor (when I was very young and found these allergies out) did tell my family that it's very normal to only have type-specific nut allergies. You should look into finding a specialist for your son...no offense, but your doctor just doesn't seem to know what he's talking about!
http://veganrockergirl.blogspot.com