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Primary giant retroperitoneal liposarcoma mimicking liver tumor

Piotr Hogendorf, Adam Durczyński, Dariusz Szymański, Stanisław Sporny, Janusz Strzelczyk

Med Sci Tech 2011; 52(1-2): CR75-77

ID: 882081

Background:    Soft-tissue sarcomas are relatively uncommon and represent less than 1% of all malignant tumors. They may be most frequently located in the retroperitoneum and may mimic other tumors of adjacent structures.
    Case Report:    We describe the case of 50-year-old-female admitted to our department because of recurring, intermittent pain of 2 months duration in the right upper quadrant. An US scan revealed a giant tumor of the right lobe of the liver. A CT scan confirmed a bulky mass 20×16×17 cm in the right lobe of the liver, inhomogeneously enhancing in the late phase. The primary diagnosis was tumor of the right lobe of the liver. Intraoperatively, a 24 cm tumor was found in the retroperitoneal space, probably arising from the right adrenal gland, infiltrating the right renal artery. There were 4 metastases 2–3 cm in diameter, 1 located in the transverse colon mesentery and the others in the small bowel mesentery, which were not revealed in CT imaging. The mass was excised with the right kidney, and the metastases were also excised. The pathological diagnosis of dedifferentiated liposarcoma was made.
    Conclusions:    Computed tomography assessment is the most useful diagnostic tool in case of retroperitoneal tumors as well as liver tumors, but this is not always reliable, as our case has shown. However, this diagnostic discrepancy did not alter the treatment plan and prognosis for the patient.

Keywords: Liposarcoma, Retroperitoneal sarcomas, Surgical treatment, liver tumor

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