CDK4 and liposarcoma: By contrast, liposarcomatous differentiation in PTs is not underpinned by amplification of the MDM2/CDK4 locus (Liu et al., 2016; Lyle et al., 2016), which is a well‐characterized driver of well‐differentiated and dedifferentiated liposarcomas and frequently detected in uterine adenosarcomas (Howitt et al., 2015; Piscuoglio et al., 2016a).