Peripheral T-Cell Lymphoma-TBX21

**Semantic type:** Neoplastic Process

**Definition:** A molecular subtype of peripheral T-cell lymphoma, not otherwise specified, characterized by high expression of T-box 21 (TBX21). It is composed of a polymorphic lymphocytic infiltrate admixed with abundant inflammatory cells and is associated with a better prognosis compared to peripheral T-cell lymphoma-GATA3.

**Synonyms:** - PTCL-TBX21