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Journal Article
Undifferentiated sarcoma of the liver: a case study of an erythropoietin-secreting tumor.
International Journal of Surgical Pathology 2014 September
Undifferentiated embryonal sarcoma of the liver (UESL) is an uncommon hepatic tumor usually found in children, with rare cases reported in adults. We present a case of a 53-year-old woman with an undifferentiated sarcoma of the liver (USL), which resembles UESL, who initially presented with a markedly elevated hematocrit (61.2%). Cytogenetic studies for polycythemia vera were negative, but the patient's erythropoietin (EPO) was elevated. A computed tomography scan and subsequent partial hepatectomy revealed a well-circumscribed, partially cystic mass in the right lobe of the liver measuring 34 cm. Following surgery, the patient's EPO level and hematocrit dropped to within normal range and remained so for 1 year, at which point it rose again. A subsequent magnetic resonance imaging scan showed a liver mass at the previous resection margin, consistent with a recurrence. In this case study, we describe the first reported USL resembling an UESL that secretes EPO, which was a useful marker of tumor recurrence.
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