| lymphoblastic leukemia | (n) a form of lymphocytic leukemia in which the abnormal cells in the circulating blood are almost totally lymphoblasts |
| acute lymphocytic leukemia | (n) acute leukemia characterized by proliferation of immature lymphoblast-like cells in bone marrow, lymph nodes, spleen, and blood; most common in children, Syn. acute lymphoblastic leukemia |