In patients above the age of two years, the American College of Gastroenterology recommends IgA anti-tissue transglutaminase antibody testing and intestinal biopsy in patients with a strong suspicion of CD [14]. According to the British Society of Gastroenterology, serological tests and duodenal biopsy are required for the diagnosis of CD [15]. The gene discussed is TGM2; the disease is Cowden disease.