Nevertheless, no significant association was evident between Gal-9 expression and OS among patients with gastric cancer (pooled HR = 0.78, 95% CI = 0.56–1.09, P = 0.140), NSCLC (pooled HR = 0.99, 95% CI = 0.57–1.73, P = 0.979), urinary tumors (pooled HR = 1.04, 95% CI = 0.21–5.26, P = 0.958). Here, LGALS9 is linked to gastric cancer.