PDCD1 and neoplasm: The tumor volume and weight in the combination therapy group were 371.5379 ± 84.83121 mm3 and 0.3 ± 0.09189 g, whereas the PBS-treated group was 2122.229 ± 261.3108 mm3 and 2.743 ± 0.5291 g, the ZD55-IL-24-treated group was 830.6364 ± 167.3815 mm3 and 1.2 ± 0.2737 g, and the anti-PD-1-treated group was 1903.805 ± 169.4441 mm3 and 2.3 ± 0.1878 g.