Undifferentiated Embryonal Sarcoma of the Liver: A Concise Review

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  • Juan Putra
    From the Department of Pathology, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire.
  • Kim Ornvold
    From the Department of Pathology, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire.

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<jats:p>Undifferentiated embryonal sarcoma of the liver is an aggressive mesenchymal tumor that occurs predominantly in children. Although this entity has been described for decades, its pathogenesis is still obscure. Its association with mesenchymal hamartoma has been well described on the basis of identical chromosomal abnormalities. The clinical and radiological diagnoses are often difficult, and the diagnosis of undifferentiated embryonal sarcoma of the liver is based on its histology and immunophenotype. It is essential to recognize the characteristic histologic findings and the pattern of the immunohistochemistry staining to rule out other hepatic lesions. Multimodal therapy with surgery, chemotherapy, and radiation therapy has drastically improved the prognosis of patients with undifferentiated embryonal sarcoma of the liver. This successful management requires timely diagnosis for superior outcome.</jats:p>

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