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Background Gallbladder polyps affect approximately 5% of the global population, with rates highest in those of Indian descent. 10% of polyps will have malignant potential based on their size or rapid growth rate, which are associated with a poor 5-year survival once advanced of less than 25%. As gallbladder polyps are common but gallbladder cancer is rare, it is a diagnostic challenge to determine which polyps are likely to be malignant. Adherence to guidelines regarding radiological follow up and definitive treatment, in the form of a cholecystectomy, is therefore vital. Methods Retrospective data collection and analysis was completed for all patients who had a biliary ultrasound between December 2013 and December 2016 to enable 5-year follow up, and a snapshot of 47 patients selected at random. Patients having a gallbladder “polyp” documented on their scan report were eligible for inclusion and adherence to European Society of Gastrointestinal and Abdominal Radiology (ESGAR) guidelines was assessed. Results Within the cohort there was a mean age of 56 years, with a male:female ratio of 17:30. All patients included were Caucasian, with 41 reporting “biliary symptoms” as the indication for the primary ultrasound. 26 patients were not followed up in adherence to guidelines, with 50% due to the sonographer reporting follow-up was not indicated on initial scan, 5 having unchanged polyp size and 2 discharged by the responsible consultant. Of the 21 who were followed up according to guidelines, 20 had a cholecystectomy within 5years, with none of these patients having cancer detected on histology. Conclusions Over 50% of patients within our cohort were not followed up according to the ESGAR guidelines. Although no patients in the study were found to have malignant polyps, the sample size is relatively small and limited to low-risk groups. We aim to expand this audit both locally and regionally, raise awareness of the importance of surveillance across the multi-disciplinary team, and produce local guidance for the outpatient setting.

P-O03 The Management of Gallbladder Polyps at a Single Trust: Are we compliant with European Guidelines?