CXCL13 and sarcoidosis: However, four cases of other diseases had high CSF CXCL13 over 1000 pg/mL, IgG4‐related disease: 1568 and 1043 pg/mL, sarcoidosis: 1390 pg/mL, and metastatic brain tumor: 1320 pg/mL (Figure 1A; Table S1).