_:vb50941389 . _:vb50941389 . _:vb50941389 . _:vb50941389 . _:vb50941389 "A B-lymphoblastic leukemia/lymphoma that is composed of B-lymphoblasts which contain more than 50 and usually less than 66 chromosomes."^^ . _:vb50941389 "url:https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&ns=ncit&code=C80335"^^ .