NEFL and myeloid sarcoma: They were both inversely correlated with age (r = −0.278, Padj = 0.018 and r = −0.319, Padj < 0.001, respectively), EDSS (r = −0.254, Padj = 0.042 and r = −0.240, Padj = 0.01, respectively), and serum NFL (r = −0.251, Padj = 0.048 and r = −0.177, Padj = 0.04, respectively) in the whole MS population.