Children with celiac disease, diagnosed with or without biopsy, present similar adherence to gluten-free diet and serology decline

Current professional guidelines enable diagnosing pediatric Celiac Disease (CeD) without a biopsy, when tissue transglutaminase (TTG) IgA antibodies are >  × 10 the upper limit of normal (ULN) and anti-endomysial antibodies (EMA) are positive in a second sample. We compared baseline characteristics and serology normalization in children diagnosed with or without biopsies. A retrospective study of pediatric patients diagnosed with CeD during 2020: group A, no biopsy and group B, biopsy-based diagnosis. Baseline characteristics included demographics, anthropometrics, symptoms, family history, and celiac serology. Follow-up at 6-month intervals, up to 18 months, included dietary compliance, symptoms, and serology. Of 145 children diagnosed with CeD, 42 (29%) and 103 (71%) were from group A and B respectively. Mean age was 7.8 years (range 2.4–17.9 y), 91 (62.8%) females. Baseline symptoms or signs were present in 93 (64.1%) children, without significant difference between the groups. Baseline TTG levels were >  × 10 ULN in all patients in group A and 71 (68.9%) in group B. Among these patients, the rate of TTG decline during follow-up did not differ at any time point between patients diagnosed with and without biopsy, and between patients with and without symptoms. At the last follow-up visit, 24 (57%) children in group A and 46 (65%) in group B had TTG <  × 3 ULN without significant difference between the groups. Conclusion: Rate of TTG decline did not differ between CeD patients diagnosed with and without biopsy, suggesting that, at least in short term, no biopsy approach may not change patients’ adherence and families’ attitude towards treatment.