_:vb50941392 "A B-lymphoblastic leukemia/lymphoma that is characterized by the presence of lymphoblasts that carry a translocation between the E2A gene on chromosome 19 and the PBX1 gene on chromosome 1."^^ . _:vb50941392 . _:vb50941392 . _:vb50941392 . _:vb50941392 "url:https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&ns=ncit&code=C80347"^^ . _:vb50941392 .