CHI3L1 and myeloid sarcoma: There was a statistically significant relationship between CHI3L1 and NFL in the MS (rs = 0.460; P = 0.002), NIND (rs = 0.503; P = 0.003), and OIND (rs = 0.964; P < 0.001) diagnosis groups, and between CHI3L1 and pNFH in the MS (rs = 0.691; P < 0.001) and NIND diagnosis groups (rs = 0.691; P < 0.001) (Table 4).