Giant Dedifferentiated Liposarcoma of the Retroperitoneum

A retroperitoneal liposarcoma is a rare tumor. It is classified as several subtypes according to the quantity of lipid, mucoid lipid, and the differentiation of cells. When a tumor is histologically composed of well to poorly differentiated liposarcoma and non-lipomatous sarcoma, it is called a dedifferentiated liposarcoma. Although the prognosis of most liposarcomas are better than other sarcomas…