Anaplastic Large Cell Lymphoma, ALK-Negative

**Semantic type:** Neoplastic Process

**Definition:** A T-cell peripheral lymphoma morphologically indistinguishable from anaplastic large cell lymphoma, ALK-positive. It is characterized by the absence of the translocation involving the ALK gene and lacks expression of ALK fusion protein.

**Synonyms:** - ALCL, ALK- - ALK-Negative Anaplastic Large Cell Lymphoma - Anaplastic large cell lymphoma, ALK negative