| umls-concept:C0023452 | skos:definition | MSH: When the disease process is confined to a mass lesion with no or minimal evidence of blood and less than 25% marrow involvement, the diagnosis is lymphoblastic lymphoma; with blood and greater than 25% marrow involvement, ALL is the appropriate term.,NCI: An acute lymphoblastic leukemia occurring during childhood. The majority of cases are B-acute lymphoblastic leukemias. Approximately 15% of the cases are T-acute lymphoblastic leukemias. | lld:umls |
