The localisation of micro‐neoplasms and fully developed primary tumours in the subventricular zone, and in other areas of neurogenesis (such as the hippocampus) [23] can be explained by discoveries that were only emerging at that time: Not only mature astrocytes (the intended target of the transgene expression), but also neural stem and progenitor cells express GFAP [46, 47], thus explaining the neoplastic transformation within cell populations of the germinal matrix in newborns. This evidence concerns the gene GFAP and neoplasm.