I have followed the discussion on the classification of coeliac disease (CD) published in the autumn issue of Gastroenterology and Hepatology from Bed to Bench with great interest. In my opinion, the ongoing debate on CD focuses around three issues: firstly, do we need a duodenal biopsy for the diagnosis of CD? Secondly, is it necessary to classify the mucosal pathology? Thirdly, which classifi...