Of 377 patients with metastatic nonsquamous NSCLC (Figure 1), 105 (28%), 104 (28%), and 103 (27%) had PD-L1 expression of ≥50%, 1–49%, and <1%, respectively; PD-L1 expression was not documented for 65 patients (17%). The gene discussed is CD274; the disease is non-small cell lung carcinoma.