T lymphoblastic leukemia/lymphoma https://github.com/monarch-initiative/mondo/issues/9542 UMLS:C1301359 ICDO:9837/3 NCIT:C8694 A neoplasm of lymphoblasts committed to the T-cell lineage, typically composed of small to medium-sized blast cells. When the neoplasm involves predominantly the bone marrow and the peripheral blood, it is called T acute lymphoblastic leukemia. When it involves nodal or extranodal sites it is called T lymphoblastic lymphoma. (WHO, 2001) precursor T lymphoblastic leukemia/lymphoma GARD:0023552 precursor T-lymphoblastic lymphoma/leukemia DOID:5599 precursor T lymphoblastic lymphoma/leukemia MEDGEN:224897 MONDO:0003537 precursor lymphoblastic lymphoma/leukemia T-cell and NK-cell neoplasm