TEX19 is mammalian‐specific and so the D. melanogaster l(3)mbt tumour studies do not shed any light on whether TEX19 is required early in the oncogenic programme, as well as being required to maintain the proliferative status of cancer cells, although preliminary analysis of human tumour progression arrays suggests that it is activated early in the oncogenic programme (Planells‐Palop et al., 2017). This evidence concerns the gene TEX19 and cancer.