IL2 and Pleural effusion: In the pleural effusion of TP patients, positive correlations were identified between sAPRIL and IFN-γ (Pearson’s correlation coefficient: r = 0.8412, p = 0.0023), IL-12p70 (Pearson’s correlation coefficient: r = 0.8211, p = 0.0036) and IL-2 (Pearson’s correlation coefficient: r = 0.7424, p = 0.0139) (Figure 5.B).