PTPRC and oculopharyngeal muscular dystrophy: Although the total PD-L1+ population was not significantly higher in moderate-severe OED than in NDL, we observed a significant increase in CD45+PD-L1+ population in moderate-severe OED (0.6% vs. 0.3%; p = 0.018), suggesting that the immune cells in high-risk OPMD express PD-L1 (Figure 5B).