We also observed the differential expression of key PC markers, including RGS5, PDGFRβ, COL1A2, ACTA2, TACLN and COL3A1, in rosette areas (hypercellular) versus neuropil (hypocellular) tumor areas of a published RNA-seq dataset of microdissected ETMR (n sample = 1) (Supplementary Fig. S12B)7. The gene discussed is ACTA2; the disease is neoplasm.