Seven Hüseyin, Alkan Zeynep, Cakir Burak Omür, Sam Bülent, Uslu Berna, Turgut Suat
Department of Otolaryngology, Sişli Etfal Training and Research Hospital, Istanbul, Turkey.
Kulak Burun Bogaz Ihtis Derg. 2003 Dec;11(6):161-5.
We investigated topographical anatomic features of the external branch of the superior laryngeal nerve (SLN) in relation to the superior thyroid artery (STA) and its vulnerability to injury in individuals with a normal thyroid size.
Thirty fresh cadavers (18 females, 12 males; age range 20 to 50 years) with a normal thyroid size and no signs of abnormality in the neck were studied. The external branch of the SLN was identified and classified according to the system proposed by Cernea et al.
The topographical relationship between the external branch of the SLN, the STA, and the upper pole of the thyroid gland was identified in 54 thyroid lobes (90%). Identification was not possible in six lobes because of bleeding or injury. The location of the external branch of the SLN was consistent with type 1 in 28 lobes (51.8%) and type 2 in 26 lobes (48.2%; type 2a in 37.1% and type 2b in 11.1%). No significant relationships existed between the type of the nerve, gender, and age, nor was there any symmetry with regard to the location of the external branch of the SLN in the same subject.
Nearly half of the Turkish population with a normal thyroid gland size present high surgical risks during thyroid surgery because of the course of the external branch of the SLN.
我们研究了正常甲状腺大小个体中喉上神经外支（SLN）与甲状腺上动脉（STA）的局部解剖特征及其易损伤性。
研究了30具甲状腺大小正常且颈部无异常体征的新鲜尸体（18例女性，12例男性；年龄范围20至50岁）。根据Cernea等人提出的系统对SLN的外支进行识别和分类。
在54个甲状腺叶（90%）中确定了SLN外支、STA与甲状腺上极之间的局部关系。由于出血或损伤，6个叶无法进行识别。SLN外支的位置在28个叶（51.8%）中与1型一致，在26个叶（48.2%；2a型占37.1%，2b型占11.1%）中与2型一致。神经类型、性别和年龄之间不存在显著关系，同一受试者中SLN外支的位置也不存在任何对称性。
由于SLN外支的走行，近一半甲状腺大小正常的土耳其人群在甲状腺手术期间存在较高的手术风险。
