Genomic Changes in Childhood Acute Lymphoblastic Leukemia

In order to know the genomic evolution of childhood acute lymphoblastic leukemia, we will collect bone marrow (10c.c.) at diagnosis, remission and relapse. We will do the following genes in addition to gene-chip including IKZF1,ETV6, EBF1, NR3C1, RAG1/G2, TCF3, BTLA, PAX5,LEF1, ERG and VPREB1.We will study the gene dosages and degree of methylation. The estimated patients numbers will be 300-400. Then we will correlate these data with patients'age, white blood cell count at diagnosis, cytogenetic abnormalities, response to the chemotherapy and prognosis.