Transcript levels of TIMP1 were significantly higher in the HCV MC vasculitis cohort [1.80 ± 0.70 (NV), 4.8 ± 1.10 (HCV MC-Vasc), 2.80 ± 0.70 (HCV), 2.90 ± 1.00 (HIV/HCV); p = 0.03 between HCV MC-Vasc and HCV viremic]. The gene discussed is TIMP1; the disease is vasculitis.