However, serum VEGF levels rose relatively quickly in MWA group, slightly below control levels at 3d (P = 0.045), and then rose to the same level as control group at 7 d (P = 0.998), the tumor diameters rose to the same level too at 7 d (P = 0.640), both of them in MWA group were higher than control group at 14d (all P < 0.05), which was consistent with previous studies suggesting that incomplete thermal ablation of tumors may promote residual tumor growth. The gene discussed is VEGFA; the disease is neoplasm.