【摘要】    目的    总结分析甲状腺微小癌（TMC）的超声图像特点，提高术前诊断水平。 方法    回顾性分析2003年1月至2009年1月中山大学附属第一医院收治34例经手术和病理证实的TMC彩色多普勒超声图像特点。结果    32例（94.1%）为低回声，28例（82.4%）形态不规则或欠规整，26例（76.5%）边界不清，26例（76.5%）伴细小样或斑块样钙化，7例（20.6%）彩色多普勒超声（CDFI）检出血流信号，RI 0.7～1.0，4例（11.8%）有淋巴结转移者淋巴结伴有液化、细小钙化表现。  结论    低回声、形态不规则、边界不清、瘤内钙化是TMC具有特征性的超声表现，了解这些特点可以提高TMC的术前诊断水平。

Ultrasound characteristics of thyroid microcarcinoma        PAN Fu-shun*，XIE Xiao-yan，LI Xiao-xi，et al. *Department of Ultrasound, the First Affiliated Hospital of Sun Yat-sun University, Guangzhou 510080,China
Corresponding author：XIE Xiao-yan，E-mail：xxy1992@live.cn
Abstract    Objective    To investigate the ultrasound characteristics of thyroid microcarcinoma. Methods    The ultrasound imaging of thirty-four cases of thyroid microcarcinoma confirmed by surgery and pathology between January 2003 and January 2009 at the First Affiliated Hospital of Sun Yat-sun University was analyzed retrospectively. Results Thirty-two (94.1%) cases were detected as hypo-echo nodules. Twenty-eight (85.3%) cases were with irregular shape. Twenty-six (76.5%) cases were with irregular edges calcification. Blood flow was detected in 7 cases with CDFI and lymph node metastasis was found in 4 cases. Conclusion    Hypo-echo nodules, regular shape, irregular edges and calcification are the ultrasound characteristic. Comprehending the characteristics may improve the pre-operation diagnosis efficacy.