Sirvent et al. reported that the immunopositivities of MDM2 and CDK4 were 76.5% (26/34) and 82.4% (28/34) in WDLPS, and 100% (8/8) and 100% (8/8) in DDLPS, respectively [21]. Here, CDK4 is linked to dedifferentiated liposarcoma.