The analysis of cerebrospinal fluid (CSF) from patients with inflammatory brain disorders like multiple sclerosis and Lyme neuroborreliosis revealed significantly increased levels of BAFF, CXCL-12, and CXCL-13 compared to patients with non-inflammatory neurological diseases (36), and BAFF protein levels were upregulated in patients with neuro-Behçet’s disease (37). The gene discussed is TNFSF13B; the disease is Lyme disease.