PROM1 and neoplasm: So far, markers have been used: CD133/Promonin-1, a prominin family of pentaspan membrane proteins; Nestin, a protein found in neural stem cells in SVZ and other markers of neuroepithelial stem cells: Musashi-1, Sox-2, GFAP, Map-2, Neural-tubulin, Neurofilament O4, Noggin, and CD15 have all been proposed in order to identify tumour stem cells [61–63].