The diagnosis of<unk><unk>  is made when at least four of the following five or three out of four (if the HLA genotype is not performed)<unk><unk>  are met: typical symptoms (chronic diarrhea, chronic abdominal pain, malabsorption, bloating, constipation, failure to thrive/weight loss, anorexia, vomiting, GERD), serum positivity for Ig A autoantibodies at high titer, HLA-DQ2 or HLA-DQ8 genotypes,<unk>  enteropathy on small intestinal biopsy, and response to gluten-free diet.
Celiac disease diagnostic criteria
H.pylori gastritis guideline recommendation
H.pylori gastritis guideline recommendations
Celiac disease physical examination
Whipple's disease laboratory findings
Irritable bowel syndrome classification
Lactose intolerance laboratory findings
Pyloric stenosis laboratory findings