TCF3 and B-cell acute lymphoblastic leukemia: Microarray technology has evidenced the gain of genes, previously known to be constitutively expressed in cHL, like STAT6 (12q31), NOTCH1 (9q34), JUNB (19p13) and, recently, TCF3 or E2a (19p13.3), associated also with pre-B cell acute lymphoblastic leukemia.