Abstract: Abstract］  ObjectiveTo observe the ultrasonographic features of cervical lymph node metastasis in thyroid carcinoma, and to investigate the value of ultrasonography in the diagnosis of cervical lymph node metastasis of thyroid carcinoma. MethodsUltrasound imaging features of 503 cases of cervical metastatic lymph nodes in 169 patients with thyroid carcinoma were analyzed. ResultsMetastatic lymph nodes in the neck of thyroid carcinoma show medium or low echo,lymph node blood mainly showed peripheral blood supply type and no blood supply type. There was no significant difference in metastatic lymph node length(L), short diameter(S), L/S and resistance index(RI) in different pathological types of thyroid carcinoma（P＞005）. L/S ratio mean value was less than 1.8 and blood flow RI mean number was more than 06. Micro calcification(calcification foci＜2 mm ) was the characteristic manifestation of metastatic lymph nodes in papillary carcinoma of the thyroid gland. ConclusionThe metastatic lymph nodes of thyroid carcinoma have typical characteristics of ultrasound image.To master the characteristics of the manifestation is helpful to improve the detection rate, wchich possess important clinical practical value.

Key words: thyroid neoplasms, lymph nodes, ultrasonography