In all studied cases, the percentage of the individual cells of the immune system expressing TLR2 was statistically and significantly higher in patients with HD compared to the control group: for mDC BDCA-1+CD19−TLR2+ (3.99-fold average); for pDC BDCA-2+CD123+TLR2+ (average 3.14-fold); for classical MONs CD14+CD16−TLR2+ (mean 3.67-fold); for non-classical MONs CD14+CD16+TLR2+ (mean 3.45-fold) (Table 2). Here, TLR2 is linked to Huntington disease.