When cells derived from these sarcomas were cultured in Edu-containing medium, there was increased proliferation in the KrasG12D/+; p53f/f; Ng2/Cspg4f/f tumor cells compared with KrasG12D/+; p53f/f; Ng2/Cspg4+/+ cells (Fig. 4, C and D) as detected by EdU staining. The gene discussed is CSPG4; the disease is neoplasm.