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Background/Aims: To identify the number and potential causes of unnecessary diagnostic procedures in a cohort of patients with autoimmune pancreatitis (AIP). Methods: All AIP cases at our centre between April 2006 and April 2013 were collected and followed up. Diagnosis was established by the International Consensus Diagnostic Criteria (ICDC). Demographic, clinical, radiological, serological data, the number of diagnostic procedures and the reason for referral were recorded. Possible risk factors for a delayed diagnosis of AIP were analysed. Results: A total of 29 patients (median age 60 years; 22 males and 7 females) were diagnosed with AIP using ICDC. Twenty-five patients were diagnosed with definite, 2 with possible type 1 AIP and 2 with type 2 AIP. In 29 patients, 50 ERCPs and 18 EUS were carried out; based on ICDC recommendations, a total of 20 ERCPs and 4 EUS were unnecessary diagnostic procedures. Eight patients (23.0%) were referred for unnecessary surgery. Jaundice was shown to be a significant risk factor for unnecessary endoscopic investigations (OR 11.00, 95% CI 1.14-106.43, p = 0.04). Conclusion: Diagnosis of AIP still remains a challenge. Patients with jaundice are at particular risk of being subjected to unnecessary endoscopic procedures. Use of ICDC would help avoid unnecessary examinations or even major surgeries at times.

Background: Newer techniques such as mucosal resection, submucosal dissection and risky polypectomy will probably lead to increasing numbers of iatrogenic perforations. Reliable immediate closure of these lesions would increase safety and acceptance of the interventions. Methods: All acute directly observed perforations during diagnostic or therapeutic endoscopy were treated by the application of an over-the-scope clip. All consecutive patients from 2009 to August 2011 were followed in our tertiary referral center. The main outcome was technically successful closure of the perforation during endoscopy with a subsequent clinical observation for 24 h. Results: During the observation period, acute perforation occurred in 14 patients. All but 1 patient had technically successful treatment. Due to persistent abdominal pain, 3 patients had to be sent to the theater for laparoscopic evaluation after colon perforation. These 3 lesions were proven to be sealed and no resection of the colon was indicated. One patient with gastric adenocarcinoma had to be resected subtotally following endoscopic mucosal resection. Hospital stay ranged from 2 to 21 days. Conclusion: Directly observed perforations up to 30 mm diameter during endoscopy should be treated by deploying an over-the-scope clip. Endoscopists should be encouraged to be trained and to use over-the-scope clips in the stomach, duodenum and colon.