The data shows that in patients with HD, a statistically significant decrease in FOXP3 MFI was observed in the lymphocyte-gated populations (median –14.14; 95% CI –31.46 – 4.05; p = 0.0234) and the T lymphocyte-gated populations (median –16.41; 95% CI –27.45 – 6.47; p = 0.0391). The gene discussed is FOXP3; the disease is Huntington disease.