_:vb50941363 . _:vb50941363 . _:vb50941363 . _:vb50941363 "url:https://en.wikipedia.org/wiki/Precursor_B-cell_lymphoblastic_leukemia"^^ . _:vb50941363 "A B-cell acute lymphoblastic leukemia that is characterized by the presence of too many B-cell lymphoblasts in the blood and bone marrow."^^ . _:vb50941363 .