JAK2 mutation (8 cases, 28.6% of Ph-like ALL): 6 cases (75.0%) had JAK2 p.V617F (exon 14) and 2 cases (25.0%) had JAK2 p.R683G (exon 12), all confirmed by digital PCR (allele frequency 8.3 ± 2.5%) and Sanger sequencing. Here, JAK2 is linked to acute lymphoblastic leukemia.