Case Report
Copyright ©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Sep 6, 2021; 9(25): 7459-7467
Published online Sep 6, 2021. doi: 10.12998/wjcc.v9.i25.7459
Pseudomyxoma peritonei originating from intestinal duplication: A case report and review of the literature
Xue-Di Han, Nan Zhou, Yi-Yan Lu, Hong-Bin Xu, Jun Guo, Lei Liang
Xue-Di Han, Nan Zhou, Jun Guo, Lei Liang, Department of Ultrasound, Aerospace Center Hospital, Beijing 100049, China
Yi-Yan Lu, Department of Pathology, Aerospace Center Hospital, Beijing 100049, China
Hong-Bin Xu, Department of Myxoma, Aerospace Center Hospital, Beijing 100049, China
Author contributions: Han XD, Liang L, and Xu HB performed the related study; Han XD and Liang L collected the data; Liang L, Zhou N, and Lu YY analyzed the data; Han XD and Liang L wrote and reviewed the manuscript; Liang L and Guo J approved the manuscript; all authors read and approved the final manuscript.
Supported by Aerospace Center Hospital Fund, No. YN201710; and Gold-Bridge Funds for Beijing, No. ZZ21054.
Informed consent statement: Informed written consent was obtained from the patient for publication of this report.
Conflict-of-interest statement: All authors report no conflicts of interest related to this manuscript.
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: Lei Liang, PhD, Associate Professor, Department of Ultrasound, Aerospace Center Hospital, No. 15 Yuquan Street, Haidian District, Beijing 100049, China. lianglei_csk@126.com
Received: December 16, 2020
Peer-review started: December 16, 2020
First decision: June 4, 2021
Revised: July 8, 2021
Accepted: July 19, 2021
Article in press: July 19, 2021
Published online: September 6, 2021
Processing time: 257 Days and 19.3 Hours
Abstract
BACKGROUND

Pseudomyxoma peritonei (PMP) is a rare mucinous neoplasm with a relatively low incidence of 1 to 2 per million individuals. It is typically characterized by a type of gelatinous ascites named “jelly belly”. Most cases of PMP occur in association with ruptured primary mucinous tumors of the appendix (90%). Periodically, PMP can originate from mucinous carcinomas at other sites, including the colorectum, gallbladder, and pancreas. However, unusual origin can occur, as noted in this case report.

CASE SUMMARY

A 52-year-old woman had an unusual derivation of PMP from intestinal duplication. The patient complained of abdominal distension and increasing abdominal girth. Abdominal contrast-enhanced computed tomography showed a mass in the greater omentum located on the left side of the abdomen, likely to be a cystic mass of peritoneal origin. A PMP diagnosis was presumed based on the specific signs of the mass with flocculent and stripe-like echoes in ultrasound images. Ultrasound-guided percutaneous aspiration suggested a high likelihood of PMP. Once the PMP diagnosis was recognized, identification of the origin of the primary tumor was indicated. Thus, an exploratory laparoscopy was performed. In the absence of a primary tumor of appendix origin, the diagnosis of a low-grade mucinous neoplasm of intestinal duplication origin was finally confirmed by histopathology.

CONCLUSION

PMP is secondary to mucinous carcinomas of the appendix mostly. This case resulted from an unusual derivation from intestinal duplication.

Keywords: Pseudomyxoma peritonei; Mucinous tumor; Mucinous ascites; Intestinal duplication; Diagnosis; Case report

Core Tip: Pseudomyxoma peritonei (PMP) happens rarely. Most of the tumors that occur in PMP are not primary, but secondary to ruptured mucinous tumors of other organs. Existent medical literature shows that the appendix is the most common origin site. However, other origins such as intestinal duplication can occur. The present case report describes a 52-year-old patient with PMP that is derived from a primary intestinal duplication.