Human cadaveric model for studying the preservation of mental nerve during transoral endoscopic thyroidectomy.

Standard lateral 5-mm vestibular incisions are safe for determining MN integrity. The 10-mm median vestibular incision divided the medial ramifications of MN at a rate of 12-25%. These may result in MN ipsilateral or bilateral paralysis. Hence, it is recommended to locate the median incision more inferiorly or vertically.