label: Childhood B Acute Lymphoblastic Leukemia with t(9;22)(q34.1;q11.2); BCR-ABL1
label_lc: childhood b acute lymphoblastic leukemia with t(9;22)(q34.1;q11.2); bcr-abl1
description: "A B acute lymphoblastic leukemia that occurs during childhood. It is characterized by the presence of lymphoblasts that carry a translocation between the BCR gene on chromosome 22 and the ABL1 gene on chromosome 9. It results in the production of the p190 kd or p210 kd fusion protein. It has an unfavorable clinical outcome."