peripheral T-cell lymphoma
(peh-RIH-feh-rul ... lim-FOH-muh)
One of a group of aggressive (fast-growing) non-Hodgkin lymphomas that begin in mature T lymphocytes (T cells that have matured in the thymus gland and gone to other lymphatic sites in the body, including lymph nodes, bone marrow, and spleen). Also called mature T-cell lymphoma.