甲状腺结节在临床上非常常见,有10%~67%的成年人患有甲状腺结节,约50%的尸检病例中均发现有甲状腺结节的存在~([1])。其中大部分为良性结节,在成年人中只有5%的结节为恶性,且患者的年龄一般>60岁或<20岁~([2-4])。甲状腺恶性结节的组织学分型主要分为乳头状癌、滤泡癌、髓样癌及未分化癌等四种类型。其中乳头状癌最常见,其次为滤泡癌,髓样癌及未分化癌较少见[5]。超声是对甲状腺肿瘤最常用的 Thyroid nodules are clinically very common, with 10% to 67% of adults having thyroid nodules and thyroid nodules found in about 50% of autopsy cases (1). Most of them are benign nodules, with only 5% of nodules in adults being malignant, and the patients are typically> 60 years old or <20 years old ([2-4]). Histologic classification of malignant thyroid nodules are mainly divided into four types: papillary carcinoma, follicular carcinoma, medullary carcinoma and undifferentiated carcinoma. Among them, papillary carcinoma is most common, followed by follicular carcinoma, medullary carcinoma and undifferentiated carcinoma [5]. Ultrasound is the most commonly used thyroid tumor