CD79A and celiac disease: Similarly, the updated recommendations of the American College of Gastroenterology (ACG), the Protocol for the Early Diagnosis of Coeliac Disease published by the Spanish Ministry of Health, and the recommendations of the British and Italian Societies of Gastroenterology endorse the use of tTG-IgA antibodies as the preferred sole test for diagnosing coeliac disease in children under two years of age [8,18,19,24].