ISL1 and central nervous system cancer: Genes specifically expressed in central support cells beneath the hair cells likewise express genes that label stem cells in other organs, such as fabp7/Blbp, which labels glioma stem cells, radial glia cells, NSCs, (Kim et al., 2016; Morihiro et al., 2013) and isl1 that is expressed in quiescent intestinal stem cells and stem cells in the heart (Makarev and Gorivodsky, 2014; Shin et al., 2015).