Endoscopic thyroidectomy using gasless axillary approach for low-risk papillary thyroid carcinoma.

To evaluate the application of endoscopic thyroidectomy using gasless axillary approach (ET-GA) for low-risk papillary thyroid carcinoma (PTC). Patients with T1N0M0 Ⅰ PTC undergoing unilateral thyroid lobectomy with central neck dissection in Taizhou Cancer Hospital during January 2019 to June 2021 were enrolled in the study, including 35 cases treated with ET-GA (ET-GA group) and 35 cases treated with conventional open thyroidectomy (COT group). The surgical treatment effect, cosmetic effect and the effect on neck function were compared between two groups. Neck function was evaluated by neck pain score, neck injury index and dysphagia index. Cosmetic effect was evaluated by cosmetic effect satisfaction score. In the ET-GA group, all unilateral thyroid lobectomy with central neck dissection were successfully completed, and no case was converted to open surgery. The number of central lymph nodes dissected in the ET-GA was not statistically different from that in the COT group (>0.05), but the operation time was longer than that of the COT group (<0.01). In the ET-GA group, 2 cases (5.7%) had transient vocal cord paralysis and 1 case (2.9%) had postoperative bleeding. In the COT group, 1 case (2.9%) had transient vocal cord paralysis, no postoperative bleeding. There was no significant difference in the complication rate between two groups (>0.05). At and postoperatively, there was no significant difference in neck pain score and neck injury index between two groups (both >0.05); dysphagia index was lower in ET-GA group, but the difference was not statistically significant (>0.05). The cosmetic effect satisfaction score of ET-GA group was higher than that in the COT group at postoperatively (4.3±0.6 vs.1.0, <0.01). ET-GA has the same efficacy and safety as conventional open thyroidectomy in the treatment of low-risk PTC, and it improves the satisfaction of postoperative cosmetics.