precursor lymphoblastic lymphoma/leukemia DOID:5600 precursor lymphoblastic lymphoma/leukemia GARD:0023553 precursor lymphoid neoplasm precursor lymphoblastic leukemia/lymphoma A neoplasm of immature malignant lymphocytes (lymphoblasts) committed to the B-cell or T-cell lineage. Neoplasms involving the bone marrow and the peripheral blood are called precursor lymphoblastic leukemias or acute lymphoblastic leukemias. Neoplasms involving primarily lymph nodes or extranodal sites are called lymphoblastic lymphomas. -- 2003 MONDO:0003538 NCIT:C7055 MEDGEN:235492 UMLS:C1335469 lymphoid neoplasm