CAJ | 학술논문

目的：研究耳蜗神经管单纯性狭窄的影像学表现及相关临床意义。方法回顾性分析14例17耳临床证实感音性神经耳聋仅有单纯性耳蜗神经管狭窄高分辨 CT 表现患者,测量相应耳蜗神经管及内听道宽度,与正常耳比较,通过 SPSS16.0统计软件进行分析,并观察蜗轴筛孔区基底部结构。8例行 MRI 内听道轴位与斜矢状位薄层扫描。结果 HRCT 14例17耳耳蜗神经管径明显狭窄,有2耳骨性封闭,耳蜗神经管平均宽度为(0.5±0.3)mm,内听道平均宽度约(4.6±1.0)mm,正常11耳耳蜗神经管平均宽度为(2.1±0.2)mm,内听道平均宽度(5.1±1.3)mm,正常组与异常组耳蜗神经管宽度具有明显统计学差异,2组内听道宽度无明显统计学差异。异常组中12耳蜗轴筛孔区基底部裂隙消失,正常组11耳筛孔区基底部裂隙皆存在；8例内耳 MRI 均未显示耳蜗神经。结论耳蜗神经管狭窄可不伴内听道狭窄单独出现,MRI 可以显示耳蜗神经发育不良。
목적：연구이와신경관단순성협착적영상학표현급상관림상의의。방법회고성분석14례17이림상증실감음성신경이롱부유단순성이와신경관협착고분변 CT 표현환자,측량상응이와신경관급내은도관도,여정상이비교,통과 SPSS16.0통계연건진행분석,병관찰와축사공구기저부결구。8례행 MRI 내은도축위여사시상위박층소묘。결과 HRCT 14례17이이와신경관경명현협착,유2이골성봉폐,이와신경관평균관도위(0.5±0.3)mm,내은도평균관도약(4.6±1.0)mm,정상11이이와신경관평균관도위(2.1±0.2)mm,내은도평균관도(5.1±1.3)mm,정상조여이상조이와신경관관도구유명현통계학차이,2조내은도관도무명현통계학차이。이상조중12이와축사공구기저부렬극소실,정상조11이사공구기저부렬극개존재；8례내이 MRI 균미현시이와신경。결론이와신경관협착가불반내은도협착단독출현,MRI 가이현시이와신경발육불량。
Objective To study the imaging manifestations and clinical significance of simple cochlear nerve canal(CNC)stenosis. Methods The HRCT findings of 14 patients(1 7 ears)with simple CNC stenosis diagnosed sensorineural hearing loss(SNHL)were retrospectively analyzed.The width of CNC and internal auditory canal was measured and compared with the normal ears,the data were statisti-cally analyzed by SPSS1 6.0.Thin-sliced MRI of internal auditory canal (axial and oblique sagittal position)was performed in 8 cases. Results HRCT displayed obvious CNC stenosis in all 14 patients(1 7 ears),2 ears with cochlear nerve canal atresia.Width of CNC and internal auditory canal was (0.5±0.3)mm and (4.6±1.0)mm,it was (2.1±0.2)mm and (5.1 ±1.3)mm in normal ears (1 1 ears),the width of CNC was of significant difference between normal ears and ears with SNHL,and there was no statistical sig-nificant difference in width of internal auditory canal.12 ears(from 1 7 ears with simple CNC stenosis)were lacking of fissure in the cribriform area,1 1 ears(normal ear)were existence of fissure in the cribriform area;cochlear nerves were not shown in 8 patients with MRI examination.Conclusion CNC stenosis can be isolated from internal auditory canal stenosis,MRI could display cochlear nerve dysplasia(CND).