Correlations between serum and CSF NFL were ρ = 0.620 (95% CI 0.558–0.675, p < 0.001) for patients with MS, ρ = 0.385 (95% CI 0.092–0.616, p < 0.001) for HCs, and ρ = 0.740 (95% CI 0.571–0.849, p < 0.001) for patients with OND (figure 3, A–C). The gene discussed is NEFL; the disease is myeloid sarcoma.