Objective To investigate the role of exposure recurrent laryngeal nerve to avoid injury in thyroid surgery.Methods 150 cases of thyroid gland neoplasms were included in this study.Recurrent laryngeal nerves were revealed in 125 cases of thyroid adenoma.The nerves were revealed in 10 cases in another 25 cases of thyroid cancers.Results The recurrent laryngeal nervers were revealed in 135 cases in total.As follows from half to four years,unilateral recurrent laryngeal nerve parslysis occured in 5 cases o...