The growth of Dicer overexpressed xenograft was significantly decreased compared with that of control pCMV xenograft at 25 days after implantation (Fig. 3A), and the tumor volume of Dicer overexpressed xenograft was smaller than that of control xenograft and SGC7901 cell xenograft at 28 days after implantation (Fig. 3B, p < 0.01). The gene discussed is DICER1; the disease is neoplasm.