Subtypes of Acute Lymphoblastic Leukemia: This data set, available on the website [20], contains 6 subtypes of pediatric acute lymphoblastic leukemia, corresponding to six diagnostic groups: BCR-ABL, E2A-PBX1, MLL, T-ALL, TEL-AML1, Hyperdiloid>50. The gene discussed is BCR; the disease is acute lymphoblastic leukemia.