Emergency (****); * (*): *-* This open-access article distributed under the terms of the Creative Commons Attribution NonCommercial 3.0 License (CC BY-NC 3.0). Copyright © 2015 Shahid Beheshti University of Medical Sciences. All rights reserved. Downloaded from: www.jemerg.com 78 Emergency (2015); 3 (2): 78-80 CASE REPORT Periampullary Diverticulum Perforation Following Endoscopic Retrograde Cholangiopancreatography (ERCP); a Case Report Li-Wei Lin1, Chin-Chu Wu2, Lee-Won Chong3, Aming Chor-Ming Lin1,4,5* 1. Emergency Department, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. 2. Department of Medical Imaging, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. 3. Department of Gastroenterology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. 4. Department of Intensive Care Unit, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. 5. School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan. *Corresponding Author: Aming Chor-Ming Lin; Emergency Department, Shin Kong Wu Ho-Su Memorial Hospital, 95 Wen Chang Rd, Taipei 111 Taiwan, School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan. Tel: +886-02-28332211 Ext 2082; Fax: +886-02-28353547; Email: amingphd@yahoo.com.tw, M002001@ms.skh.org.tw Received: October 2014; Accepted: November 2014 Abstract Endoscopic Retrograde Cholangiopancreatography (ERCP) is widely used for the diagnosis and treatment of biliary and pancreatic tract disease. Perforation is a rare complication of it, but it is associated with high rate of mortality, an overall mortality rate of 1.0-1.5%. Here, a case of massive subcutaneous emphysema following ERCP was re- ported without an obvious retroperitoneal or peritoneal perforation. Key words: Cholangiopancreatography, endoscopic retrograde; subcutaneous emphysema; pneumomediastinum, diagnostic Cite this article as: Lin LW, Wu CC, Chong LW, Chor-Ming Lin A. Periampullary diverticulum perforation following endoscopic retrograde cholangiopancreatography (ERCP); a Case Report. Emergency. 2015;3(2):78-80. Introduction: ndoscopic Retrograde Cholangiopancreatography (ERCP) is widely used for the diagnosis and treat- ment of biliary and pancreatic tract disease (1). Although this is considered as a safe diagnostic tool, if operated by experts, it still carries a significantly high rate of complications including hemorrhage, perforation, infection, pancreatitis and cardiopulmonary events. Per- foration is a rare complication, but it is associated with high rate of mortality, an overall mortality rate of 1.0- 1.5% (2). Here, a case of massive subcutaneous emphy- sema following ERCP was reported without an obvious retroperitoneal or peritoneal perforation. Case presentation: A 94-year old woman was presented to the emergency department (ED) because of general weakness, ab- dominal pain, and dyspepsia for 4 days. She had diabetes mellitus, chronic atrial fibrillation, hypertension, and coronary artery disease with multi-vessel stenting in her medical history. The patient’s vital sign at the admission time included blood pressure of 182/86 mmHg, heart rate of 78 beats/minute, respiratory rate of 22 beats/mi- nute, and oxygen saturation of 97% on room air. She was afebrile and physical examination showed the ab- dominal right upper quadrant tenderness without peri- toneal signs. The rest of physical examinations were un- remarkable. Abdominal ultrasonography demonstrated on a small gallbladder without gallstone as well as dila- tation of the main bile duct and bilateral intra-hepatic ducts. The complete blood cell count showed the follow- ing results: leukocyte count 5100/mm3 with 77.8% of segmented neutrophils, hemoglobin 12 gram/deciliter, and platelet 180000/microliter. Other laboratory find- ings included: glucose 134 milligram/deciliter, blood urea nitrogen (BUN) 24 milligram/deciliter, serum cre- atinine 1.8 milligram/deciliter, sodium 134 milliequiva- lent/liter, potassium 3.8 milliequivalent/liter, serum glutamic oxaloacetic transaminase (SGOT) 26 unit/liter, albumin 3.5 gram/deciliter, total bilirubin 1.0 milli- gram/deciliter, lipase 31 unit/liter, and with an Interna- tional Normalized Ratio (INR) of 1.52. With assumption of obstructive biliary tract process, the patient underwent ERCP. During cannulation of the bile duct, a guidewire was applied to enter via the ampulla of Vater. In spite of iatrogenic penetrating of a periampular diverticulum in the first try (Figure 1), the guidewire was inserted into the bile duct for sphincterotomy, intraduc- tal ultrasonography, biopsy, and stenting. The final diag- nosis was distal common bile duct stenosis. Due to old age and comorbidities of the patient, she was shifted to the ED for more observation. After 2 hours, patient be- came symptomatic with dyspnea and abdominal pain. Repeated physical examination revealed generalized subcutaneous emphysema with extensive puffiness and E This open-access article distributed under the terms of the Creative Commons Attribution NonCommercial 3.0 License (CC BY-NC 3.0). Copyright © 2015 Shahid Beheshti University of Medical Sciences. All rights reserved. Downloaded from: www.jemerg.com 79 Li-Wei et al Figure 1: Endoscopic view shows guidewire (arrow) perfora- tion of a periampullary diverticulum. palpable crepitation in all over the body from head to the extremities. She had mild fever and abdominal disten- tion without any peritoneal signs. Her oxygen saturation was 94% on room air. Laboratory test results showed leukocyte count of 18400/mm3 with left shift. The whole body computed tomography (CT) scan revealed extensive subcutaneous emphysema (Figure 2). Since there was no evidence of either contrast leakage from the biliary tract or fluid collections in the peritoneal and retroperitoneal cavity, she was conservatively managed with oxygen supplement, nasogastric tubing, parenteral nutrition, and broad-spectrum antibiotics. The patient responded well and gradual resolution of the subcutaneous emphysema was happened after 9 days. Discussion: The presence of subcutaneous emphysema following ERCP is an uncommon but well-recognized complica- tion. The most common cause of this problem is duode- nal perforation resulting in retroperitoneal collections of free air. Perforation is now reported in less than 1% of ERCPs with sphincterotomy (3). Periampullary divertic- ulum perforation during ERCP is the rarest complication, which is usually manifested by abdominal pain, fever, leukocytosis, and hemodynamic compromise. A high in- dex of suspicion is required for timely correct diagnosis of ERCP-related perforations because of signs and symp- toms, often mimic other intra-abdominal processes (4, 5). Retroperitoneal air may spread through the fascial planes to the subcutaneous space or dissect into the per- itoneal or pleural cavities, resulting in pneumoperito- neum, pneumothorax, or pneumomediastinum. This manifestation is known as Ginkgo sign (6). Isolated neck and scrotal subcutaneous emphysema as well as cases of generalized subcutaneous emphysema extended to the Figure 2: Computed tomography scan (coronal view) shows extensive subcutaneous emphysema. Contrast retention in the common bile duct (arrow) after ERCP is also shown without evidence of leakage. face, neck, trunk, and upper extremities have been re- ported (7). In such situation, the first imaging study is usually an abdominal X-ray. CT scans can help assessing contrast leakage and identify any retroperitoneal or in- traperitoneal free air (8). The treatment outcome de- pends on clinical manifestations and the type and sever- ity of the leak (9). Although patients with perforations may be conserva- tively treated perforations, which are remote from the papilla and those with free contrast extravasation with or without evidence of sepsis may need surgical inter- vention (10-12). This case shows that periampullary di- verticulum perforation secondary to ERCP may be man- aged conservatively with intravenous fluid therapy, broad-spectrum antibiotics, nasogastric tube decom- pression, and parenteral nutrition. Acknowledgment: None. Conflict of interest: None. Funding support: None. Authors’ contributions: All authors passed four criteria for authorship contribu- tion based on recommendations of the International Committee of Medical Journal Editors. This open-access article distributed under the terms of the Creative Commons Attribution NonCommercial 3.0 License (CC BY-NC 3.0). Copyright © 2015 Shahid Beheshti University of Medical Sciences. All rights reserved. Downloaded from: www.jemerg.com Emergency (2015); 3 (2): 78-80 80 References: 1. Rhim AD, Kochman ML. A young woman with gallstone pancreatitis and abnormal liver tests: when is endoscopic retrograde cholangiopancreatography needed? Clinical gastroenterology and hepatology: the official clinical practice journal of the American Gastroenterological Association. 2008;6(7):741-5. 2. GuIDElInE A. Complications of ERCP. Gastrointest Endosc. 2012;75:467-73. 3. Loperfido S, Angelini G, Benedetti G, et al. Major early complications from diagnostic and therapeutic ERCP: a prospective multicenter study. 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