Others have found that the platelet-derived growth factor receptor (PDGFR), which HCMV uses to infect epithelial, endothelial, and fibroblast cells [135], displays increased expression in patient gliomas compared to normal tissue [136], leaving the possibility that glioma formation may promote CMV infection and not the other way around [137]. The gene discussed is PDGFRB; the disease is glioma.