PD-L1 Combined Positive Score Less than 1

**Semantic type:** Laboratory or Test Result

**Definition:** A semi-quantitative immunohistochemical finding indicating that the number of all PD-L1-expressing cells divided by the total number of viable tumor cells in a sample multiplied by 100 is less than 1.

**Synonyms:** - CD274 CPS Less than 1 - PD-L1 CPS <1 - PD-L1 CPS Less than 1 - PDL1 CPS Less than 1