No lipids were correlated with IgG index in MS cases, however, heterodimeric IL-12 and IL-23 sharing the same p40 subunit (IL-12/IL-23p40) (r=0.5, p=0.001, q=0.009), CXCL13 (r=0.5, p=0.005, q=0.01) and CXCL10 (r=0.5, p=0.006, q=0.01) were positively correlated with IgG index (online supplemental table 9). Here, CXCL10 is linked to myeloid sarcoma.