Surgeons can improve outcomes in endoscopic thyroidectomy by leveraging newly defined surgical planes and landmarks.

• The dissecting triangle between strap muscles and thyroid lobe ensures 100% identification of inferior thyroid vessels and middle thyroid vein.
• The inferior and superior parathyroid glands were located accurately in 92.5% and 90% of cases, respectively.
• Understanding these zones aids in preserving recurrent laryngeal nerves, identified beneath the inferior parathyroid in 85.7% of instances.

Implementing these findings could reduce complications for patients undergoing this minimally invasive procedure.