Localizing and qualitative diagnosis of papillary microcarcinoma of thyroid by ultrasound        ZHAO Jing-zhu，GAO Ming，ZHANG Sheng，et al. Department of Thyroid & Neck Tumors，Tianjin Medical University Cancer Institute & Hospital，Key Laboratory of Cancer Prevention and Therapy,Tianjin 300060，China
Corresponding author：GAO Ming，E-mail：tijgaom@163.com
Abstract    Objective    To appreciate the value of ultrasonography in the diagnosis of papillary microcarcinoma of the thyroid. Methods    Data of 92 cases of papillary microcarcinoma of the thyroid was analyzed for ultrasound characteristics and diagnosis. Results    The nodules were graded by TI－RADS. Papillary microcarcinoma of the thyroid can be diagnosed according to features detected by ultrasound，including hypo-echo tubercle，microcalcification，irregular and indefinite border，with an accuracy rate of 89.1%.Two-dimensiona and high-frequency sonography is helpful to localizing and qualitative diagnosis of papillary microcarcinoma. Conclusion    Ultrasonography has a very important effectiveness for localizing and qualitative diagnosis of papillary microcarcinoma，which provid the valuable diagnostic evidence to the individual therapy.