Natural Killer Cell Lymphoblastic Leukemia/Lymphoma

**Semantic type:** Neoplastic Process

**Definition:** A precursor lymphoid neoplasm that expresses CD56 and immature T-cell markers, lacks B-lymphoid and myeloid markers, and has immunoglobulin and T-cell receptor genes in the germline configuration.

**Synonyms:** - NK Cell Lymphoblastic Leukemia/Lymphoma - NK Lymphoblastic Leukemia/Lymphoma - NK-ALL/LBL - NK-Lymphoblastic Leukemia/Lymphoma - Precursor NK Cell Lymphoblastic Leukemia/Lymphoma - Precursor Natural Killer Cell Lymphoblastic Leukemia/Lymphoma