Location of the AICA influences the severity but not occurrence of ISSNHL:A reappraisal using high-resolution 3T MRI
Guoping Zhang1
Hongbin Li2
Zikai Zhao2
Mingxing Zhang2
Jing Zou3
1.Department of Otolaryngology-Head and Neck Surgery,Changhai Hospital,Second Military Medical University,Shanghai,China;Current Address:Department of Otolaryngology,Beijing Daxing District Peo-ple's Hospital,Capital Medical University,Beijing,China2.Department of Otolaryngology-Head and Neck Surgery,Changhai Hospital,Second Military Medical University,Shanghai,China3.Department of Otolaryngology-Head and Neck Surgery,Changhai Hospital,Second Military Medical University,Shanghai,China;Faculty of Information Technology and Communication Sciences,Tampere University,Tampere,Finland
摘要：Objective:To investigate the potential influence of anatomical variation in the anterior inferior cerebellar artery(AICA)on the occurrence and severity of idiopathic sudden sensorineural hearing loss(ISSNHL).
Methods:Ninety ISSNHL patients were enrolled.The anatomical location of the AICA was exhibited using high-resolution magnetic resonance imaging(MRI),and the various AICA types classified by previously reported Chavda and Gorrie methods were analyzed.The severity of hearing loss in the ipsilateral ear among different AICA types was compared.
Results:Approximately 85.6％of subjects had unilateral ISSNHL(uISSNHL),and the others had bilateral ISSNHL(bISSNHL).In the uISSNHL group,the ratios of different AICA types were similar between the ipsilateral and contralateral ears.The ratios of the different AICA types in the bISSNHL group were similar to those in the uISSNHL group.In the uISSNHL group,pure tone audiometry(PTA)thresholds at 2 kHz,4 kHz and 8 kHz of patients with Chavda type Ⅱ AICA were higher than those of patients with Chavda type Ⅰ and type Ⅲ,with a significant difference at 4 kHz between type Ⅰ and type Ⅱ.There was a tendency of the PTA threshold in patients with Chavda type Ⅱ or Gorrie type C to gradually increase from low to high frequency zones.
Conclusion:When the AICA enters the IAC(Chavda type Ⅱ)or crosses between the 7th and 8th cranial nerves(Gorrie type C),the severity and frequency of hearing impairment in ISSNHL but not the occur-rence of ISSNHL will be affected.
机标关键词：aicahigh-resolutioninfluencesissnhllocationoccurrencereappraisalseverity
论文发表日期：2023-12-30
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：6( 193-198 )
英文信息