Abstract: In this article, the correlation between ultrasonographic features and clinical parameters in Hashimoto's thyroiditis complicated with thyroid micropapillary carcinoma patients were investigated. 75 cases of patients with Hashimoto's thyroiditis complicated with thyroid micropapillary carcinoma were selected as study group, while 696 cases of patients with Hashimoto's thyroiditis were treated as control group from January 2010 to December 2018. The clinical and pathological features, two-dimensional ultrasound image characteristics and the internal image characteristics of blood flow in the two groups were analyzed. As the result, there was no significant difference in the average tumor diameter, number of lesions, thyroid structure, shape and halo between the two groups (P>0.05). And there were significant differences in the gender composition, calcification, internal echo and internal blood flow between the two groups (P<0.05). Multivariate Logistic regression analysis showed that female, microcalcification, unclear marginal echo, very low internal echo, no internal blood flow were risk factors for Hashimoto's thyroiditis with thyroid micropapillary carcinoma (P<0.05). In conclusion, ultrasound can efficiently diagnose Hashimoto's thyroiditis with thyroid micropapillary carcinoma.

Key words: Hashimoto's thyroiditis, thyroid micropapillary carcinoma, ultrasonography, characteristics