CXCL13 and cancer: Among the various viral genes encoded by EBV, LMP1 is a well‐known tumorigenic factor that has been implicated in tumor progression, invasion, and metastasis in multiple types of cancers.[20] In our study, we identified a specific malignant NK cluster (NK_C9_CXCL13) marked with the unique expression of LMP1, which was presented at the central stage in the developmental process from normal NK to heterogeneous malignant cells.