CD274 and neoplasm: According to tumor diameter, the positivity rates of PD-L1 expression using the 73–10, SP142, and E1L3N assays were 16.1%, 3.2%, and 9.7% at tumor diameter ≤ 20 mm, and 19.4%, 9.7%, and 16.1% at tumor diameter > 20 mm, respectively.