PD-L1 Tumor Proportion Score Greater than or Equal to 1

**Semantic type:** Laboratory or Test Result

**Definition:** A semi-quantitative finding indicating that at least 1 percent of the viable tumor cells in a sample are positive for PD-L1 expression by immunostaining.

**Synonyms:** - CD274 TPS Greater than or Equal to 1 - PD-L1 TPS Greater than or Equal to 1 - PD-L1 Tumor Proportion Score Greater than or Equal to 1 Percent - PDL1 TPS Greater than or Equal to 1