miR- 101 has been described to be a pro-apoptotic factor in childhood acute lymphoblastic leukemia [50] and miR-7 as an tumor suppressor inhibiting various receptor tyrosine kinases such as EGFR [51], IGF-1R [52] and p21 activated kinase (PAK1) [53]. The gene discussed is NTRK1; the disease is acute lymphoblastic leukemia.