Comparison of the morphology of hematogones and neoplastic lymphoblasts in bone marrow smears.

(A) Several hematogones are illustrated in this bone marrow smear from a 3-year-old boy with immune thrombocytopenia. They bear close resemblance to the neoplastic lymphoblasts illustrated in panel B. (B) Numerous lymphoblasts are present in this bone marrow smear from a 5-year-old girl with precursor B-ALL.