VTCN1 and neoplasm: Mean tumor volume at the end of the 30-day observation period was 656.19 ± 21.08 mm3 in the negative control group and 311.79 ± 19.35 mm3 in the B7-H4-shRNA cells group (p= 0.028), while the corresponding mean weights were 0.418 ± 0.051g and 0.276 ± 0.012 g (p=0.011, Figure 5B-5C), respectively.