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
Case characteristics

A 34-year-old man was referred to our hospital with right upper abdominal pain, and a pancreatic solid and cystic lesion found on computed tomography (CT), magnetic resonance (MR) image with MR cholangiography, and endoscopic ultrasonography (EUS).

Clinical diagnosis

Branch duct type intraductal papillary mucinous neoplasm.

Differential diagnosis

Serous cystadenoma among solid and cystic pancreatic neoplasms.

Laboratory diagnosis

Abnormal laboratory results included slightly elevated level of total bilirubin (1.3 mg/dL, normal range of 0.2-1.2) and gamma-glutamyl transferase (108 IU/L, normal range of 8-60).

Imaging diagnosis

CT and MR imaging showed a delayed contrast-enhanced solid lesion containing pruning-pattern branch duct dilatation in uncinate process and head of pancreas, with small hyperechoic mural nodules in the dilated branch ducts on EUS.

Pathological diagnosis

Microscopic findings of resected specimen revealed mass forming chronic pancreatitis including branch duct dilatation.


The patient was treated with pylorus-preserving pancreaticoduodenectomy.

Related reports

There have been many reports for the discrimination between mass forming chronic pancreatitis and pancreatic adenocarcinoma using various imaging modalities.

Term explanation

There are no non-standard medical terms used in this manuscript.

Experiences and lessons

The author presents this case to share the very unusual but important knowledge that mass forming chronic pancreatitis might include the branch duct dilatation.