_:vb50953502 . _:vb50953502 . _:vb50953502 . _:vb50953502 "A hematopoietic cancer that derives_from the blood-forming stem cells of the bone marrow."^^ . _:vb50953502 "url:http://nci.nih.gov/dictionary/?CdrID=430857"^^ . _:vb50953502 . _:vb50953502 .