After collecting the tumor tissues and measuring the tumor size, we found that sh-CCAT1 remarkably reduced the tumor size (Figures 6(a) and 6(b)) Furthermore, H&E staining and Ki-67 IHC results revealed that knockdown of CCAT1 significantly reduced the lesion number in the tumor tissues and decreased the Ki-67 proliferation index (Figures 6(c)–6(e)). This evidence concerns the gene MKI67 and neoplasm.