Gal-9 also especially showed significant correlation with PD-1 (p<0.001), PD-L1 (p<0.001), CD3 (p<0.001), CD4 (p<0.001), CD8 (p=0.04), and FOXP3 (p=0.002) in advanced SCLC. Here, LGALS9 is linked to small cell lung carcinoma.