umls-concept:C0079772 | skos:definition | MSH: A group of heterogeneous lymphoid tumors representing malignant transformations of T-lymphocytes.,NCI: A disease in which certain cells of the lymph system (called T lymphocytes) become cancer.,NCI: A non-Hodgkin lymphoma of T-cell lineage. It includes the T lymphoblastic lymphoma and the mature T- and NK-cell lymphomas. -- 2003 | lld:umls |