Celiac Disease in Children
What is Celiac Disease?
Celiac disease is an immune-mediated condition caused by a permanent intolerance to gluten, a protein found in wheat, rye, and barley. The immune reaction damages the lining of the small intestine (villi), leading to malabsorption of nutrients. It affects genetically susceptible individuals, often associated with HLA-DQ2 or DQ8 genes. Onset may occur at any time after gluten is introduced.
History & Background
Historically, diagnosis relied on intestinal biopsy showing villous atrophy, crypt hyperplasia, and increased intraepithelial lymphocytes. Over time, as serologic (blood antibody) tests improved, newer guidelines (NASPGHAN, ESPGHAN) allowed for a 'no-biopsy diagnosis' (European model) in select cases when strict criteria are met (very high tTG antibody levels, symptoms, confirmatory EMA, HLA typing).
Signs & Symptoms
- Diarrhea, constipation, bloating, abdominal pain
- Poor growth or weight loss (failure to thrive)
- Vomiting
- Fatigue, irritability
- Iron deficiency or anemia refractory to treatment
- Dental enamel defects, bone/joint pain, skin rashes
Diagnosis
Screening tests (blood work):
The first step is usually serology. The tissue transglutaminase IgA (tTG-IgA) is the standard screening test. Because some children have IgA deficiency, a total IgA level is checked as well. In certain cases, endomysial antibodies (EMA) or deamidated gliadin peptides (DGP) are also used.
Histology from duodenal biopsy:
If blood tests suggest celiac disease, an upper endoscopy with small bowel biopsies may be performed. Characteristic findings include villous atrophy, crypt hyperplasia, and increased intraepithelial lymphocytes.
European (ESPGHAN) no-biopsy model:
In carefully selected children, a diagnosis may be made without biopsy. This requires very high tTG-IgA levels (≥10 times the upper limit of normal), positive EMA, compatible symptoms, and presence of HLA-DQ2 or HLA-DQ8 genes.
Treatment
The only current treatment for celiac disease is a strict, lifelong gluten-free diet. This requires complete avoidance of wheat, rye, and barley. Even small amounts of gluten can trigger damage. A dietitian experienced in celiac disease is essential to help families learn safe foods, prevent cross-contamination, and manage nutrition. Supplementation with iron, calcium, vitamin D, folate, or B12 may be needed, especially at diagnosis.
Monitoring & Follow-Up
Regular follow-up is important to ensure growth and healing:
- Monitor height, weight, and growth patterns
- Repeat tTG-IgA every 3–6 months initially, then spacing out once normalized
- Assess for resolution of symptoms
- Ensure adherence to gluten-free diet and provide ongoing education
Resources
NASPGHAN
– Pediatric Celiac Disease resources including clinical guidelines and family education tools.
https://www.naspghan.org/professional-resources/medical-professional-resources/celiac-disease/
University of Chicago Celiac Disease Center
– Excellent resource for families with fact sheets, safe food guides, and education.
https://www.uchicagomedicine.org/conditions-services/gastroenterology/celiac-disease/education
Celiac Disease Foundation – Trusted resource on the gluten-free diet, label reading, and research updates.
References
NASPGHAN. GI Kids: Patient Education Resources. North American Society for Pediatric Gastroenterology, Hepatology and Nutrition. https://www.gikids.org
American Academy of Pediatrics (AAP). Pediatric Gastroenterology Clinical Reports and Patient Education. https://www.aap.org
Blaufuss, T. Common Sense Pediatric GI: Practical Guidance for Families. Dakota Pediatric Gastroenterology, Fargo, ND, 2025.
Husby S, Koletzko S, Korponay-Szabo IR, et al. ESPGHAN Guidelines for Diagnosis of Coeliac Disease. J Pediatr Gastroenterol Nutr. 2020;70(1):141-156.
NASPGHAN. Celiac Disease in Children. GI Kids.
Celiac Disease Foundation. Children and Celiac Disease. https://celiac.org