I found this:
Children between 9 and 24 months tend to present with bowel symptoms and growth problems shortly after first exposure to gluten-containing products, pyloric stenosis[4] sometimes being a factor. Older children may have more malabsorption-related problems and psychosocial problems, while adults generally have malabsorptive problems. Many adults...
I also had pyloric stenosis corrected a 5 weeks old. I have Hashimoto's and now suspect gluten is an issue. I recently had a saliva test that showed slightly low IgA and elevated gliadin antibodies. I've read that a gluten free diet can help with thyroid antibodies. Anyone find this to be true?