In patients with sarcoidosis, fractions of Th17 cells were moderately correlated to fractions of Th1 cells (N = 23, rho = 0.53, and P = 0.009), while we found no significant correlation between Th17 cells and FoxP3+ T helper cells (N = 23, rho = 0.25, and P = 0.26) or between Th1 cells and FoxP3+ T helper cells (N = 23, rho = −0.25, and P = 0.26). This evidence concerns the gene FOXP3 and sarcoidosis.