Both the TEL-AML1 translocation and high-hyperdiploidy were associated with younger age at diagnosis (24.4 months, P?=?2.0 x 10(-4) and 12.4 months, P?=?0.011, respectively), while CDKN2A and IKZF1 deletions were associated with older age at diagnosis (19.7 months, P?=?7.0 x 10(-4) and 18.1 months, P?=?0.012, respectively). 