QUOTE (Guhlia @ Feb 7 2008, 06:38 AM)

Is it possible to react like this to something you're not allergic to? For the sake of argument, please just assume the results were accurate. Is that possible? Could an intolerance, not true allergy, cause this?
Oh, absolutely. There are different types of allergies and intolerances - and most doctors reserve the term "allergy" for IgE-mediated allergies - the ones that cause hives and, in severe cases, anaphylaxis. IgE is short for immunoglobulin E. Celiac Disease is not an IgE-mediated allergy, but instead has to do with immunoglobulins A and G - IgA and IgG. IgE allergies are easy to test for, but other types of intolerance are harder.
Board-certified allergists are specialists in IgE allergies. They don't really even think of anything else as "allergy." So they will look you in the eye and tell you your child is not allergic to ____ if your child does not show IgE antibodies for that thing.
My oldest son has a very severe IgE allergy to peanuts - anaphylaxis, etc. He also has Celiac Disease. They could run all the tests they want in an allergist's office, and they will not show him to be allergic to wheat.
I went through this frustration when my youngest child was having a problem with cereals causing eczema-type rashes and vomiting. I took him to our (very, very good children's allergy clinic) and had him tested for a variety of allergies - wheat, oats, rice, etc. I told the doctor his symptoms and even told her I thought it might be related to my own problems at the time - I showed her my rashed up elbows, etc. She said, oh, looks like some type of eczema. When the tests came back mostly negative (except one skin prick test for rice turned up mildly positive, which she dismissed because it's rare) - she did not offer me any advice that would have pointed me toward Celiac Disease.
There is a problem of "specialty blindness" - physicians get trained in their specialty and know little to nothing outside of their specialty. This wouldn't bother me so much if they tended to tell you this so you can keep talking to other physicians. But too many times they just act like your symptoms are no big deal if they can't make sense of them themselves.
Sorry for ranting a bit - I really still go to my good allergist's office for allergy advice. But I stay far clear when it comes to intolerances.
My pediatric GI has been really wonderful - he's in the same children's hospital. When I told him what had happened at the allergist's office, he rolled his eyes and said something like allergists don't believe that intolerances exist, or something like that. He's part of a group researching IgG and other types of food reactions that cause eosinophilic disorders.
If you find a doc who knows about eosinophilic disorders, they might be willing to do what's called a "patch test" on your daughter. That's where they apply foods and leave them on the skin for a longer period of time (like a day or two), covered. My doc said this area of testing is not that accurate yet - and new tests are needed. Apparently there are many different SUB-classes of IgG - and only some of them are responsible for these types of reactions. We haven't done the IgG testing because he has not strongly recommended it - but next time we go in, I may ask about it again.
I apologize that this is long. If you can't find a physician knowledgeable about this emerging area, your best bet is to use elimination diets and your own eyes to figure out your daugther's intolerances.
It's hard!