When we compared WLPTC and classic PTC in patients with coexisting Hashimoto's thyroiditis, there were no significant differences in age, sex, multifocality, tumor size, pT stage, extrathyroidal extension, lymph node metastasis, preoperative diagnosis, or BRAF V600E mutation (Table 3). Here, BRAF is linked to metastatic malignant neoplasm in the lymph nodes.