In the comparison of median cytokine levels between patients with pulmonary TB and extrapulmonary TB, the extrapulmonary TB group had significantly lower levels of IFN-γ (p < 0.0001; Figure 2A), IL-2 (p = 0.0368; Figure 2D), IL-10 (p = 0.0373; Figure 2F) and IL-17 (p = 0.0326; Figure 2G). This evidence concerns the gene IL17A and pulmonary tuberculosis.