方法复习4例非返性喉返神经的临床资料并结合相关文献，了解非返性喉返神经的变异类型及甲状腺手术中应注意的事项。
Methods Clinical data from 4 cases of non-recurrent laryngeal nerve and related literature review was made to acknowledge its incidence, variant types and matters concerned during thyroid surgery.
方法复习4例非返性喉返神经的临床资料并结合相关文献，了解非返性喉返神经的变异类型及甲状腺手术中应注意的事项。
Methods Clinical data from 4 cases of non-recurrent laryngeal nerve and related literature review was made to acknowledge its incidence, variant types and matters concerned during thyroid surgery.
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