Lack of Expression of PD-L1

**Semantic type:** Laboratory or Test Result

**Definition:** An immunohistochemical test result that indicates lack of expression of PD-L1 in a tissue sample of a primary or metastatic malignant neoplasm.

**Synonyms:** - B7 Homolog 1 Negative - B7-H Negative - B7H1 Negative - CD274 Antigen Negative - CD274 Molecule Negative - CD274 Negative - Negative - PD-L1 Negative - PDCD1L1 Negative - PDCD1LG1 Negative - PDL1 Negative - Programmed Cell Death 1 Ligand 1 Negative