An additional report34 showed PD-L1 expression in only 10% of large cell neuroendocrine carcinoma and 5.8% of small cell lung cell cancer tumors, with no expression in other types of lung neuroendocrine tumors; in this study no significant association was observed between PD-L1 expression and overall survival. The gene discussed is CD274; the disease is lung neuroendocrine neoplasm.