CXCL10 and tropical spastic paraparesis: CSF levels of CXCL10 in HAM/TSP patients (1,067.5 pg/mL, IQR 830.5 - 1,876.0 pg/mL) were 5.8 and 8.7-fold higher than in HTLV-1 AC (182.6 pg/mL, IQR 155.2 - 401.9 pg/mL) and HTLV-1-seronegative controls (122.3 pg/mL, IQR 105.6 - 189.2 pg/mL), respectively (Figure 6).