目的    探讨二维B超在甲状腺微小乳头状癌的定性、定位诊断中的作用。方法    收集2011年6月至2011年11月间天津医科大学附属肿瘤医院收治的甲状腺微小乳头状癌病例92例，分析甲状腺微小乳头状癌的声像图特征。结果    采用甲状腺影像报告和数据系统（thyroid imaging reporting and data systerm，TI-RADS），根据超声图像的边界、包膜、内部回声、微钙化、CDFI的特征对甲状腺微小乳头状癌进行定性诊断，超声诊断准确率为89.1%。通过横切、纵切及斜切对癌灶的部位进行评估。结论    超声检查在甲状腺微小乳头状癌的临床诊断中具有独到的优势，术前准确的定性、定位诊断，以协助制定、实施个体化治疗方案。

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.