No statistically significant differences in serum SIRT1 levels were found between ON patients with MS and the control group (IQR: 3.821 ng/ml (4.35) vs. 2.130 ng/ml (0.61), p = 0.695) or between ON patients without MS and the control group (IQR: 2.124 ng/ml (0.61), 2.130 ng/ml (0.61), p = 0.989). The gene discussed is SIRT1; the disease is myeloid sarcoma.