Ozaki Ko, Yamakami Iwao, Higuchi Yoshinori, Fukutake Toshio
Narita Red Cross Hospital, Department of Neurosurgery, Narita, Chiba, Japan.
Seikeikai Chiba Medical Center, Department of Neurosurgery, Chiba, Chiba, Japan.
NMC Case Rep J. 2020 Sep 16;7(4):201-204. doi: 10.2176/nmccrj.cr.2019-0306. eCollection 2020 Sep.
Isolated hypoglossal nerve palsy (IHP), or hypoglossal nerve palsy without any other neurological signs, is rare. We report a woman with atlantoaxial dislocation (AAD) who presented with IHP due to hypoglossal nerve compression by an osteophyte at the hypoglossal canal. A 77-year-old woman presented with speech difficulties and the feeling of a swollen tongue on the left side for 3 days. Her only neurological feature was left hypoglossal nerve palsy. She had been diagnosed with AAD 2 years before. Computed tomography (CT) and high-resolution magnetic resonance imaging (MRI) revealed the compression of the basicranial hypoglossal nerve at the external orifice of the hypoglossal canal by an AAD osteophyte which was causing IHP. IHP can develop due to hypoglossal nerve compression by an osteophyte from AAD. CT and high-resolution MRI revealed this rare mechanism of IHP.
孤立性舌下神经麻痹（IHP），即无任何其他神经学体征的舌下神经麻痹，较为罕见。我们报告一例患有寰枢椎脱位（AAD）的女性，其因舌下神经管处骨赘压迫舌下神经而出现IHP。一名77岁女性出现言语困难及左侧舌肿胀感3天。她唯一的神经学特征是左侧舌下神经麻痹。她2年前被诊断为AAD。计算机断层扫描（CT）和高分辨率磁共振成像（MRI）显示，AAD骨赘在舌下神经管外口处压迫颅底舌下神经，导致IHP。IHP可因AAD骨赘压迫舌下神经而发生。CT和高分辨率MRI揭示了这种罕见的IHP发病机制。
