The regression analysis revealed a significant positive correlation between PINK1 and PARKIN concentrations in the CSF of patients with MS (R2 = 0.31; p = 0.004), with NMOSD (R2 = 0.31; p = 0.013) (Figures 2A, B), and in the serum of patient with MOGAD (R2 = 0.67; p = 0.05) (Figure 2F). The gene discussed is PRKN; the disease is myeloid sarcoma.