There was no significant difference in the expression level of TSH, TPOAb, T3, T4, FT3, FT4, CK-19, and CK-34, tumor internal components, and the presence or absence of thyroiditis between the CLNM-positive group and the CLNM-negative group (P > 0.1) (Table 2). Here, KRT19 is linked to neoplasm.