Is it possible to have an allergy or sensitivity to wheat w/out having celiac disease? if so, what are the symptoms and how is it diagnosed?

Easy to get confused: Gluten-sensitive enteropathy (celiac disease--diagnosed by small bowel biopsy or serology) is much less common than gluten intolerance. Like lactose intolerance, caffeine intolerance, sorbitol intolerance (with regard to needing to restrict each respective substance), gluten intolerants do better to avoid gluten-containing foods. About 10% of the population are gluten intolerant.