The meta-analysis showed that IL-17A overexpression within tumor was not associated with OS in patients with solid tumor (HR = 1.33, 95% CI 0.97 to 1.83, P = 0.079) (Supplementary Figure 1), with significant heterogeneity observed among studies (I2= 80.2%; P = 0.000). Here, IL17A is linked to neoplasm.