摘要Objective:To study the correlation of ultrasound vascularization index and flow index of thyroid cancer with tumor malignancy.Methods: A total of 140 patients with thyroid nodule who accepted surgical resection in our hospital between May 2013 and June 2016 were selected as the research subjects, the patients with malignant thyroid nodule were included in the malignant group of the research and patients with benign thyroid nodule were included in the benign group of research. Three-dimensional power Doppler ultrasonography was conducted before operation to determine vascularization index (VI), flow index (FI) and vascularization flow index (VFI); tumor tissues were collected after operation to detect the expression of angiogenesis as well as cell proliferation, apoptosis and invasion-related molecules.Results:VI, FI and VFI levels of tumor tissue of malignant group were significantly higher than those of benign group; VEGF, MK, Ang-2, IGF-Ⅱ, Bcl-2, Livin, Wip1, S100A4, TCF,β-catenin and SATB1 protein expression in tumor tissue of malignant group were significantly higher than those of benign group and positively correlated with VI, FI and VFI levels while CCNG2 and p27 protein expression were significantly lower than those of benign group and negatively correlated with VI, FI and VFI levels.Conclusion:Ultrasound vascularization index and flow index of thyroid cancer increase significantly and are closely related to the angiogenesis as well as cell proliferation, apoptosis and invasion.