Undiff. Pleomorphic Sarcocma : Inflammatory
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![SoftTissue_Fibrohistiocytic_UPS8B_Inflamm.jpg](/slides-13/slides/SoftTissue_Fibrohistiocytic_UPS8B_Inflamm.jpg)
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Undifferentiated Pleomorphic Sarcoma (UPS), Inflammatory Type: Some cases of UPS arising in the retroperitoneum show a prominent inflammatory component consisting of xanthoma cells, neutrophils, lymphocytes or plasma cells. There were previously referred to as inflammatory MFH. This image shows numerous plasma cells and a few lymphocytes along with scattered large atypical cells.