RT Journal Article SR Electronic T1 OC-022 Endoscopy Pitfalls in Celiac Disease Diagnosis; a Multicentre Study JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP A10 OP A10 DO 10.1136/gutjnl-2013-304907.022 VO 62 IS Suppl 1 A1 K Rostami A1 M Rostami Nejad Vincenzo Villanacci A1 Sabine Hogg- Kollars A1 Umberto Volta A1 Stefania Manenti A1 Mohammad Reza Zali A1 Giacomo Caio A1 Paolo Giovenali A1 Ausrine Barakauskiene A1 Edita Kazenaite A1 Gabriel Becheanu A1 Mircea Diculescu A1 Salvatore Pellegrino A1 Giuseppe Magazzù A1 Giovanni Cas YR 2013 UL http://gut.bmj.com/content/62/Suppl_1/A10.1.abstract AB Introduction The traditional diagnosis of celiac disease (CD) requires a small bowel biopsy to identify at histology the characteristic mucosal changes. The current biopsy practise among endoscopists for celiac disease is in most part unknown. The aims of this study were to compare the different diagnostic criteria in various centres in Italy, Iran, Lithuania, Romania and the UK, the methodological approach to the biopsy and to investigate the pitfalls of CD diagnosis. To measure the number of specimens submitted during duodenal biopsy among patients in Italy, Iran, Lithuania, Romania and the UK, and to determine the incremental diagnostic yield of adherence to the recommended number of specimens. Methods A total of 931 patients who underwent duodenal biopsy for CD were recruited prospectively at nine centres in European and Middle East countries. Small-bowel biopsies were obtained from the duodenal bulb and the second part of the duodenum (and from the duodenal bulb when it had a micronodular appearance). The histopathological appearances were described according to the modified Marsh classification. Results The most frequent degree of villous atrophy amongst Iranian subjects was 3A and that of the rest of the study population was 3C. The most common number of biopsy specimens for Romanian subjects was 1 (52%) followed by 2 for Iranian (56%), 3 for Lithuanian (66.7%) and British patients (65%) and 4 for Italian patients (48.3%). The main presenting symptom was anaemia (18.7%) followed by malabsorption (10.5%), diarrhoea (9.3%) and dyspepsia (8.2%). Conclusion Taking less biopsy samples than recommended will have a negative impact in detecting massive number of undiagnosed cases. As CD is more common with atypical presentation, taking 4 duodenal biopsies is mandatory for an accurate diagnosis or its exclusion. Disclosure of Interest None Declared