Basal levels of these four GFs were generally lower in T-ALL and BCP-ALL samples, but significantly lower values were only noted between BCP-ALL and AML blasts for G-CSF and GM-CSF (120-fold lower, p = 0.0013, and 7-fold lower, p = 0.0153, respectively). This evidence concerns the gene CSF2 and acute myeloid leukemia.