Lymphoma, T-Cell, Peripheral

**Definition:** 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.

**Tree numbers:** - C04.557.386.480.750.825 - C15.604.515.569.480.750.825 - C20.683.515.761.480.750.825

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