2.5.1 Unifactorial cox regression analysis of the influencing factors of recurrence in patients in the HT group suggested that tumor diameter and ETE (P < 0.05) were the correlates of postoperative recurrence in the HT group, whereas gender, TSH, age, the number of cancerous foci, LNM, BRAF mutation, and RET rearrangement had nothing to do with them. Here, RET is linked to neoplasm.