YAP is one of the factors that regulate PD‐L1 expression, and other factors may be involved in regulating PD‐L1 expression in various cancers.29, 30, 31, 32 For example, TAZ, another mediator of the Hippo signalling, was reported to contribute to PD‐L1 regulation in human lung cancer cells.29 Here, CD274 is linked to cancer.