Case Report
Copyright ©The Author(s) 2018. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Jan 14, 2018; 24(2): 297-302
Published online Jan 14, 2018. doi: 10.3748/wjg.v24.i2.297
Mass forming chronic pancreatitis mimicking pancreatic cystic neoplasm: A case report
Keum Nahn Jee
Keum Nahn Jee, Department of Radiology, Dankook University Hospital, Chungcheongnam-do 330-715, South Korea
Author contributions: Jee KN designed the report, collected the patient’s clinical data, drafting the article and reviewed the manuscript and approved the final manuscript as submitted.
Informed consent statement: This study was reviewed and approved the retrospective case review by Institutional Review Board of Dankook University Hospital, Cheonan, South Korea, with informed consent from the patient waived.
Conflict-of-interest statement: There are no potential conflicts (financial, professional, or personal) of interest relevant to this article to disclose by the author.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (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:
Correspondence to: Keum Nahn Jee, MD, PhD, Professor, Department of Radiology, Dankook University Hospital, Mang-hyang Street 201, Anseo-dong, Dongnam-gu, Cheonan, Chungcheongnam-do 330-715, South Korea.
Telephone: +82-41-5506921 Fax: +82-41-5529674
Received: October 19, 2017
Peer-review started: October 20, 2017
First decision: November 8, 2017
Revised: November 15, 2017
Accepted: November 22, 2017
Article in press: November 22, 2017
Published online: January 14, 2018

Mass forming chronic pancreatitis is very rare. Diagnosis could be done by the pathologic findings of focal inflammatory fibrosis without evidence of tumor in pancreas. A 34-year-old man presented with right upper abdominal pain for a few weeks and slightly elevated bilirubin level on clinical findings. Radiological findings of multidetector-row computed tomography, magnetic resonance (MR) imaging with MR cholangiopancreatography and endoscopic ultrasonography revealed focal branch pancreatic duct dilatation with surrounding delayed enhancing solid component at uncinate process and head of pancreas, suggesting branch duct type intraductal papillary mucinous neoplasm. Surgery was done and pathology revealed the focal chronic inflammation, fibrosis, and branch duct dilatation. Herein, I would like to report the first case report of mass forming chronic pancreatitis mimicking pancreatic cystic neoplasm.

Keywords: Chronic pancreatitis, Pseudotumor, Computed tomography, Magnetic resonance imaging, Endoscopic ultrasound

Core tip: Extremely unusual radiological manifestation of mass forming chronic pancreatitis mimicking pancreatic cystic neoplasm is the first case report in the English-written medical literature.