Phosphorylated STAT6 has been reported to be elevated in Ph+ ALL [31] and PDAP1 appears to be involved in PDGF signaling 32, 33, a pathway recently implicated in apoptosis-resistant ALL [21] and Ph-like ALL 8, 9, 10, 11, 12, 18. This evidence concerns the gene STAT6 and acute lymphoblastic leukemia.