CRLF2 and acute lymphoblastic leukemia: Among the 56 B-other ALL patients with clinical data, most of the BCR-ABL1-like patients showed CRLF2 overexpression clustered in the BCR-ABL1-like subgroup [12/16(75%) vs 9/40(22%) non-BCR-ABL1-like patients, P < 0.001].