CXCL13 and extranodal nasal NK/T cell lymphoma: This finding was corroborated by the colocalization of LMP1 and CXCL13 in individual cells according to immunofluorescence (IF) staining assay from an independent NKTCL collection of Southern Chinese (SC‐cohort; Figure 2B and Figure S7D, Supporting Information) and a positive correlation between LMP1 and CXCL13 expression in the malignant NK cells in our scRNA‐seq cohort and tumor samples from another NKTCL collection in Shanghai[15] (SH‐cohort; Figure S7E, Supporting Information).