Case Report
Copyright ©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Nov 26, 2020; 8(22): 5722-5728
Published online Nov 26, 2020. doi: 10.12998/wjcc.v8.i22.5722
Clinical characteristics of adult-type annular pancreas: A case report
Dan Yi, Xiao-Bo Ding, Shan-Shan Dong, Chen Shao, Li-Jing Zhao
Dan Yi, Shan-Shan Dong, Department of Hepatobiliary and Pancreatic Surgery, First Hospital of Jilin University, Changchun 130021, Jilin Province, China
Xiao-Bo Ding, Department of Radiology, First Hospital of Jilin University, Changchun 130021, Jilin Province, China
Chen Shao, Department of Pathology, Beijing You’an Hospital, Beijing 100069, China
Li-Jing Zhao, Department of Rehabilitation, School of Nursing, Jilin University, Changchun 130021, Jilin Province, China
Author contributions: Yi D was a major contributor to data acquisition, literature retrieval, and manuscript writing; Ding XB contributed to the acquisition of screening and imaging data; Dong SS and Shao C contributed to the analysis of materials and the modification of the manuscript; Zhao LJ made important modification to the manuscript; all authors read and approved the final manuscript.
Informed consent statement: All the included patients gave written and oral informed consent for publication.
Conflict-of-interest statement: The authors declare no conflicts of interest.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Li-Jing Zhao, MD, PhD, Associate Professor, Doctor, Department of Rehabilitation, School of Nursing, Jilin University, No. 2699 Xinjiang Street, Chaoyang District, Changchun 130021, Jilin Province, China. zhao_lj@jlu.edu.cn
Received: August 2, 2020
Peer-review started: August 2, 2020
First decision: August 21, 2020
Revised: August 24, 2020
Accepted: October 20, 2020
Article in press: October 20, 2020
Published online: November 26, 2020
Processing time: 115 Days and 4.3 Hours
Abstract
BACKGROUND

Annular pancreas (AP) is a rare congenital abnormal rotation of the pancreas. AP rarely occurs in adults. Pancreatic tumors and ampullary tumors are related to AP, so the discovery and treatment of AP are essential.

CASE SUMMARY

This study investigated the clinical manifestations, imaging features, complications, and treatment of six patients diagnosed with AP at the Department of Hepatobiliary and Pancreatic Surgery, First Hospital of Jilin University from January 2010 to June 2020. There were four males and two females, with an average age of 56.00 ± 9.86 years old. In this study, abdominal pain and jaundice were the main clinical manifestations. Imaging can show the “crocodile jaw sign” or “double bubble sign”.

CONCLUSION

For patients with duodenal or biliary obstruction, physicians should give priority to AP when imaging examinations suggest that the duodenum is wrapped with tissue similar to the density of the pancreas. Symptomatic patients should actively undergo surgical treatment.

Keywords: Annular pancreas, Pancreas/abnormalities, Congenital abnormalities, Biliary obstruction, Duodenal obstruction, Case report

Core Tip: Annular pancreas (AP) is a rare congenital abnormal rotation of the pancreas. AP is related to the occurrence of duodenal ulcers, pancreatitis, and digestive system tumors. In this study, the clinical manifestations, imaging features, complications, and treatment of AP were analyzed. If the imaging results show the “crocodile jaw sign”, the vigilance of congenital malformed AP should be increased for patients with digestive system obstruction.