Consistent with the previously published results from others and us, RCAS-PSG induced high- and low-grade gliomas with typical oligodendroglioma histology, containing proliferating cells expressing olig2 and other markers of neural cell lineages (Figure 1f,g; Figure S1a–d; Figure S2c–f; Figure S3a). Here, OLIG2 is linked to oligodendroglioma.