Case Report
Copyright ©The Author(s) 2016. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Radiol. Oct 28, 2016; 8(10): 846-850
Published online Oct 28, 2016. doi: 10.4329/wjr.v8.i10.846
Presumptive case of sparganosis manifesting as a hepatic mass: A case report and literature review
Gyeong Deok Jo, Jae Young Lee, Sung-Tae Hong, Jung Hoon Kim, Joon Koo Han
Gyeong Deok Jo, Department of Medicine, Seoul National University School of Medicine, Jongno-gu, Seoul 03080, South Korea
Jae Young Lee, Jung Hoon Kim, Joon Koo Han, Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul 03080, South Korea
Jae Young Lee, Jung Hoon Kim, Joon Koo Han, Institute of Radiation Medicine, Seoul National University Hospital, Jongno-gu, Seoul 03080, South Korea
Sung-Tae Hong, Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, Jongno-gu, Seoul 03080, South Korea
Sung-Tae Hong, Institute of Endemic Diseases, Seoul National University College of Medicine, Jongno-gu, Seoul 03080, South Korea
Author contributions: Jo GD and Lee JY designed the research and wrote the paper; Hong ST, Kim JH and Han JK analyzed and interpreted results.
Institutional review board statement: The study was reviewed and approved by the Seoul National University Hospital Institutional Review Board.
Informed consent statement: We were given exemption from getting informed consent by the Institutional Review Board.
Conflict-of-interest statement: The authors declare that they have no conflict of interest.
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: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Jae Young Lee, MD, PhD, Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, South Korea. leejy4u@snu.ac.kr
Telephone: +82-2-20723107 Fax: +82-2-7436385
Received: March 7, 2016
Peer-review started: March 9, 2016
First decision: May 19, 2016
Revised: July 26, 2016
Accepted: August 17, 2016
Article in press: August 18, 2016
Published online: October 28, 2016
Processing time: 233 Days and 18.4 Hours
Abstract

A 60-year-old man was admitted due to rectosigmoid colon cancer, and a hepatic mass was incidentally found during the staging work-up. The mass appeared cystic with a thick wall and contained multiple bizarre cord-like structures on ultrasound, computed tomography and magnetic resonance imaging. The differential diagnoses included organizing abscess/hematoma, foreign body granuloma and parasite infestation. Serologic study revealed anti-sparganum antibodies. Over 4-year follow-up, the patient did not complain of symptoms, and no changes in the characteristics of the liver mass were observed. Hepatic sparganosis is rare; only two cases have been clinically reported, and no detailed radiologic description was available until now. This case report presents a detailed radiologic description of a hepatic mass that could most likely represent hepatic sparganosis.

Keywords: Ultrasonography; Parasites; Sparganosis; Magnetic resonance imaging; Computed tomography; Liver

Core tip: Hepatic sparganosis is rare; only two cases have been clinically reported, and no detailed radiologic description was available until now. This report presents radiologic findings of a presumptive case of sparganosis manifesting as a hepatic mass. This hepatic mass showed nonenhancing low attenuation mass with bizarrely arranged calcified internal cord-like structures on computed tomography, a necrotic mass with internal serpiginous tubular structures on magnetic resonance imaging, and a well-defined mixed echoic mass with multiple cord-like structures on ultrasonography. The understanding of this case will help physicians to consider the possibility of hepatic sparganosis when they encounter hepatic masses with bizarrely arranged internal serpiginous structures.