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99970 Dedifferentiated liposarcoma

definition

Dedifferentiated liposarcoma (DDLS) is a high-grade subtype of liposarcoma (LS; see this term) that progresses from well-differentiated liposarcoma (WDLS; see this term), and most often occurs in the retroperitoneum. It is defined as a region of nonlipogenic sarcoma associated with WDLS. .