A group of malignant lymphomas thought to derive from peripheral T-lymphocytes in lymph nodes and other nonlymphoid sites. They include a broad spectrum of lymphocyte morphology, but in all instances express T-cell markers admixed with epithelioid histiocytes, plasma cells, and eosinophils. Although markedly similar to large-cell immunoblastic lymphoma (LYMPHOMA, LARGE-CELL, IMMUNOBLASTIC), this group's unique features warrant separate treatment.

Synonyms: Lymphoma, T Cell, Peripheral, Lymphoma, Peripheral T-Cell, Lymphoma, T-Cell, Peripheral, Lymphomas, Peripheral T-Cell, Peripheral T-Cell Lymphoma, Peripheral T Cell Lymphoma, T Cell Lymphoma, Peripheral, T-Cell Lymphomas, Peripheral, Peripheral T-Cell Lymphomas, T-Cell Lymphoma, Peripheral