CXCL13 was expressed in the tumor cells in a small subset of cases of NLPHL variants with predominant extranodular localization of the tumor cells (4/10 and 2/10 cases, respectively, for NLPHL pattern C and THRLBCL-like NLPHL) and in THRLBCL (2/10 cases), consistent with the weak upregulation observed in tumor cells compared to the GC B cells in the gene expression profiling. The gene discussed is CXCL13; the disease is neoplasm.