These studies have identified associations between chemotherapy response or survival and the CD155 rs1058402 and CD226 rs763361 variants in SCLC, although only the CD155 rs1058402 variant was associated with OS in extensive-stage disease [26], and variants in the CD274 gene in NSCLC [23,24,25]. The gene discussed is CD274; the disease is non-small cell lung carcinoma.