Other genetic features of well-differentiated liposarcomas are amplification of the 12q13–15 (including MDM2, SAS, HMGA2, and CDK4 genes), 1q21–24, 6q22–24, 20q13, or 12q24 regions, deletions of 13q14–21 or 11q22–23, and TP53 mutation [28]. This evidence concerns the gene MDM2 and liposarcoma.