蜗神经管狭窄的HRCT表现及诊断价值探讨

Invastigation of the value of HRCT in the diagnosis of cochlear nerve canal stenosis

目的 探讨蜗神经管狭窄在HRCT上的影像表现及特点,提高对该病HRCT表现的认识。方法 回顾性分析15例患者19侧HRCT轴位测量骨性蜗神经管宽度小于1.5mm,临床上表现为感音性耳聋的患者,观察其形态、病变数量及与周围结构的关系,分析其影像学表现特点。结果 15例患者19侧图像中,单侧11例（右侧5例,左侧6例）,双侧4例,以单侧发病居多,其中8例9侧伴有内听道狭窄的表现。3例患者3侧图像表现为骨性蜗神经管封闭,12例16侧患者蜗神经管宽度为0.3-1.3cmm,平均蜗神经管宽度为（0.7±0.3）mm,其中10例表现为蜗轴底部喇叭口样结构消失。结论 在感音性耳聋患者中,HRCT对蜗神经管狭窄的诊断具有重要的价值。

Objective To explore the imaging performance and characteristics of cochlear nerve canal stenosis with HRCT and to find the HRCT performance of the disease. Methods A retrospective study was conducted on 15 patients with 19 sides that cochlear nerve canal width was less then 1.5 mm on HRCT axial measurement, with clinical performance of sensorineural deafness. We observed the morphology, number of lesions and relationship with the surrounding structures and analysed of imaging features. Results In 15 cases with 19 side, 11 cases were unilateral （ right side in 5 cases and the left in 6 cases）, 4 cases were bilateral, mostly with unilateral disease, in which 8 cases of 9 sides accompanied with internal auditory canal stenosis. 3 patients with 3 side images showed cochlea nerve canal closed, 12 cases with 16 sides with cochlea nerve management width was 0.3 -1.3 cm, the average cochlea nerve canal width was （0.7 ±0.3） mm, of which 10 cases showed that cochlear axis at the bottom of the bell - like structure disappeared. Conclusion In sensorineural hearing loss patients, HRCT has an important value in the diagnosis of cochlear nerve canal stenosis.