Gut and Liver 2010; 4(2): 245-249 https://doi.org/10.5009/gnl.2010.4.2.245 A Case of Embryonal Sarcoma of the Liver Mimicking a Hydatid Cyst in an Adult
Author Information
Jin Young Yoon*, Jung Min Lee*, Do Young Kim*, Gi Hong Choi, Young Nyun Park§, Joo Won Chung*, Eun Young Kim*, Jun Yong Park*, Sang Hoon Ahn*, Kwang-Hyub Han*, and Chae Yoon Chon*
*Department of Internal Medicine, Liver Cancer Special Clinic, Departments of Surgery, and §Pathology, Yonsei University College of Medicine, Seoul, Korea

Do Young Kim
© The Korean Society of Gastroenterology, the Korean Society of Gastrointestinal Endoscopy, the Korean Society of Neurogastroenterology and Motility, Korean College of Helicobacter and Upper Gastrointestinal Research, Korean Association the Study of Intestinal Diseases, the Korean Association for the Study of the Liver, Korean Pancreatobiliary Association, and Korean Society of Gastrointestinal Cancer. All rights reserved.

Abstract
An undifferentiated (embryonal) liver sarcoma (ULS) originates from a primitive mesenchymal cell, with a predilection for childhood and very rare occurrence in adults. We report a case of a ULS that was incidentally found in a 53-year-old female. Our case was initially interpreted as a large hydatid cyst, which was later suspected to be a neoplastic lesion because its size was increasing and a solid portion was newly detected after shrinkage of the cyst following drainage. The patient underwent successful right hepatic lobectomy with complete resection, and is currently disease-free without adjuvant therapy. Although it is difficult to diagnose a hepatic cyst as a ULS due to its rare occurrence in adulthood and lack of specific findings, its possibility should be considered, especially when its size is increasing, because early diagnosis and curative resection are necessary for a favorable outcome. (Gut Liver 2010;4:245-249)
Keywords: Embryonal sarcoma; Undifferentiated sarcoma; Liver cyst; Hydatid cyst; Adult
Abstract
An undifferentiated (embryonal) liver sarcoma (ULS) originates from a primitive mesenchymal cell, with a predilection for childhood and very rare occurrence in adults. We report a case of a ULS that was incidentally found in a 53-year-old female. Our case was initially interpreted as a large hydatid cyst, which was later suspected to be a neoplastic lesion because its size was increasing and a solid portion was newly detected after shrinkage of the cyst following drainage. The patient underwent successful right hepatic lobectomy with complete resection, and is currently disease-free without adjuvant therapy. Although it is difficult to diagnose a hepatic cyst as a ULS due to its rare occurrence in adulthood and lack of specific findings, its possibility should be considered, especially when its size is increasing, because early diagnosis and curative resection are necessary for a favorable outcome. (Gut Liver 2010;4:245-249)
Keywords: Embryonal sarcoma; Undifferentiated sarcoma; Liver cyst; Hydatid cyst; Adult
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