Malignant calcific nodules were hypoechogenic, ill defined, solid, irregular, rich blood flow and absent of halo sign.

• 甲状腺恶性病变的超声图像以低回声、实质不均质、包膜不清、边界模糊、形态不规则、周边无声晕、血流丰富的微小钙化灶为主。