For example, STCs exhibited, compared to STPs, the overexpression of several markers of the mesenchymal subtype of glioblastoma [13], such as COL1A1, COL1A2, COL5A1, IGFBP6, DCBLD2, many of which are also typically expressed by microglia or reactive astrocytes in glioblastoma microenvironment [10]. Here, IGFBP6 is linked to glioblastoma.