label: B-cell acute lymphoblastic leukemia
label_lc: b-cell acute lymphoblastic leukemia
description: "A neoplasm of lymphoblasts committed to the B-cell lineage, typically composed of small to medium-sized blast cells. When the neoplasm involves predominantly the bone marrow and the peripheral blood, it is called B acute lymphoblastic leukemia. When it involves nodal or extranodal sites, it is called B lymphoblastic lymphoma. (WHO, 2001)"