THY1 and glioblastoma: However, CD90 expression was not found to be restricted to CSCs of GBM; it is also expressed by mesenchymal stem-cell-like pericytes, GBM-associated stromal cells, tumor-migrating cells, tumor-associated endothelial cell, neuronal cells, and by differentiated GBM cells (Clavreul et al., 2012; Ochs et al., 2013; Avril et al., 2017; Darmanis et al., 2017; Sauzay et al., 2019).