Frisullo et al. found increased percentage of circulating CD8+pSTAT1+, CD8+T-bet+, and CD14+pSTAT1+ cells in 14/25 peripheral blood samples of FSHD patients with STIR hyperintensities, a significant increase when compared to FSHD patients without STIR hyperintensities and healthy controls. The gene discussed is CD8A; the disease is facioscapulohumeral muscular dystrophy.