Definition:

peripheral T-cell lymphomalisten (peh-RIH-feh-rul ... lim-FOH-muh)

One of a group of aggressive (fast-growing) non-Hodgkin lymphomas that begins in mature T lymphocytes (T cells that have matured in the thymus gland and goes to other lymphatic sites in the body, including lymph nodes, bone marrow, and spleen.) Also called mature T-cell lymphoma.