PD-L1 Expression Positive in Myeloid-Derived Suppressor Cells

**Semantic type:** Laboratory or Test Result

**Definition:** An immunohistochemical test result indicating that expression of PD-L1 was detected in myeloid-derived suppressor cells (MDSCs). PD-L1 expression is significantly higher in tumor-infiltrating MDSCs than in MDSCs found in secondary lymphoid organs, bone marrow or peripheral blood and decreasing levels of PD-L1 positive MDSCs in samples taken serially during antitumor treatment may correlate with increased therapeutic efficacy.

**Synonyms:** - CD247 Positive Myeloid-Derived Suppressor Cells - PD-L1 Expression Positive in Myeloid Derived Suppressor Cells - PD-L1 Positive MDSCs - PD-L1+ MDSCs - Programmed Cell Death 1 Ligand 1 Positive Myeloid-Derived Suppressor Cells