CD9 and acute lymphoblastic leukemia: TCFL5, PIK3C3, CBFA2T3, RUNX1, EGFL7, TP53INP1 and TNFRSF7 were over-expressed and CD9 and LSP1 under-expressed in the TEL/AML1-positive ALL relative to the TEL/AML1-negative subgroup, consistent with the microarray findings (Figure 5A).