Similarly, induction of PD‐L1 expression by the EML4‐ALK oncoprotein and downstream signaling pathways has been reported in ALK‐positive NSCLC patients.24 This implies that NSCLCs harboring an ALK rearrangement are significantly associated with PD‐L1 expression.10, 11, 24. This evidence concerns the gene EML4 and non-small cell lung carcinoma.