Undifferentiated Embryonal Sarcoma of the Liver

Undifferentiated embryonal sarcoma of the liver is a rare, highly malignant mesenchymal neoplasm that predominantly affects children between six and ten years of age, with occasional occurrences in adolescents and adults. Clinically, it often presents with non-specific abdominal pain, hepatomegaly and systemic symptoms such as fever or weight loss. Imaging typically reveals a large, heterogeneous lesion with cystic and solid components, which can be mistaken for benign cysts or abscesses. Histopathological examination demonstrates pleomorphic spindle or stellate cells embedded in a myxoid stroma, frequently accompanied by eosinophilic globules and high mitotic activity. Definitive diagnosis relies on surgical biopsy with immunohistochemical staining, commonly showing positivity for vimentin and variable expression of desmin, α-smooth muscle actin and cytokeratins. Standard management involves complete surgical resection, whenever feasible, combined with multi-agent chemotherapy regimens. In unresectable or recurrent cases, orthotopic liver transplantation has emerged as a potential curative option in carefully selected patients. Despite aggressive treatment, long-term prognosis remains guarded, particularly in adults, although recent advances in combined modality therapy have improved survival in the paediatric population.

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Undifferentiated Embryonal Sarcoma of the Liver publication trend

The graph below shows the total number of articles in undifferentiated embryonal sarcoma of the liver across all publications each year (not limited to Nature Index journals).

Technical terms

Mesenchymal tumour: A neoplasm derived from connective tissue cells such as fibroblasts, myofibroblasts or smooth muscle cells.

Myxoid stroma: A gelatinous extracellular matrix rich in glycosaminoglycans that provides a distinctive, mucoid appearance under microscopy.

Complete surgical resection: Removal of the entire tumour with a margin of healthy tissue to minimise residual microscopic disease.

Adjuvant chemotherapy: Systemic drug treatment administered after primary surgery to eradicate remaining malignant cells and reduce recurrence risk.

Orthotopic liver transplantation: Surgical procedure replacing the diseased liver with a donor liver in its normal anatomical location.

References

1. Treatment of Undifferentiated Embryonal Sarcoma of the Liver in Children. Cancers (2024).
2. Undifferentiated Embryonal Sarcoma of the Liver in Children Versus Adults: A National Cancer Database Analysis †. Cancers (2021).
3. Unresectable Undifferentiated Embryonal Sarcoma of the Liver in an Adult Male Treated with Chemotherapy and Orthotopic Liver Transplantation. Cureus (2017).
4. Rare Case of Adult Undifferentiated (Embryonal) Sarcoma of the Liver Treated with Liver Transplantation: Excellent Long‐Term Survival. Case Reports in Hepatology (2012).
5. Clinicopathological study of hepatic mesenchymal hamartoma and undifferentiated embryonal sarcoma of the liver: a single center study from Iran. Diagnostic Pathology (2021).