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Massive undifferentiated embryonal sarcoma: An unusual primary hepatic malignancy.
Charles K Crawford1, Hajra Arshad1, Elliot K Fishman1
1Department of Radiology, Johns Hopkins University School of Medicine, 601 North Caroline Street, Baltimore, MD 21287-0801.
Radiology Case Reports
|August 18, 2025
Summary
Undifferentiated embryonal sarcomas of the liver (UESLs) are rare, aggressive pediatric tumors. Early diagnosis and multidisciplinary treatment, including surgery, are crucial for improving survival rates in children with this hepatic malignancy.
Area of Science:
- Pediatric Oncology
- Hepatobiliary Malignancies
- Sarcoma Research
Background:
- Undifferentiated embryonal sarcomas of the liver (UESLs) are rare, aggressive mesenchymal tumors predominantly affecting children and adolescents (5-20 years).
- UESLs present with nonspecific symptoms and variable imaging findings, often appearing as large, heterogeneous liver masses with solid and cystic components.
Observation:
- A case report details a 6-year-old boy with a large, heterogeneous embryonal sarcoma originating in the right liver lobe.
- Initial presentation included non-specific flu-like symptoms, underscoring diagnostic challenges.
Findings:
- Histopathological examination after radical resection confirmed the diagnosis of undifferentiated embryonal sarcoma of the liver.
- The tumor's heterogeneous nature and hepatic origin were key diagnostic features.
Implications:
- This case emphasizes the necessity of a multidisciplinary approach involving radiology, pathology, and surgical oncology for accurate diagnosis and effective management of UESLs.
- Timely surgical resection, combined with chemotherapy, is vital for enhancing survival outcomes in pediatric patients with this aggressive hepatic tumor.

