PRKN and myeloid sarcoma: A positive correlation was found between serum and CSF concentrations of PINK1 (R2 = 0.37; p = 0.002) (Figure 2G) and PARKIN (R2 = 0.50; p = 0.0001) (Figure 2J) in patients with MS, while no correlation was found in patients with NMOSD and MOGAD (Figures 2H, I, K, L).