CXCL13 and extranodal nasal NK/T cell lymphoma: These observations suggest a potential origin of LMP1+ malignant cells from naïve NK cells in NKTCL, consistent with the similarity between normal NK cells at an earlier stage and NKTCL cells.[34] Furthermore, we observed a developmental path from NK_C9_CXCL13 to other malignant NK cells (Figure 2H), along with the downregulation of LMP1 (Figure S10C, Supporting Information).