MiR‐19 is a member of miR‐17‐92 cluster, this cluster participates not only in the development of heart and lung,7, 8 but also in ageing and cancer.9 The target genes of miR‐17‐92 cluster have been experimentally identified so far including: STAT3, Mapk1410 and Rb2/p130.11 MiR‐17‐92 cluster plays an important role in tumourigenesis of thyroid cancer, leukaemia and lymphoma.12, 13, 14 The expression of miR‐17‐92 cluster is up‐regulated in glioma tissues. The gene discussed is RBL2; the disease is leukemia.