For example, a study on 29 individuals with BRAF mutant NSCLC found that about 69% (20 out of 29) displayed positive PD-L1 expression, and over 40% had PD-L1 levels at or above 50%, indicating a considerable presence of PD-L1 positivity in this group (24). This evidence concerns the gene BRAF and non-small cell lung carcinoma.