摘要
目的探讨蜗神经孔发育不良的多层螺旋 CT 表现。方法观察了50例100耳无中内耳疾患的正常人及9例10耳蜗神经孔发育不良患者蜗神经孔的 CT 特征,并在轴面图像上测量了蜗神经孔的横径值。结果正常组50例100耳均见筛孔区基底部骨性裂隙显示,蜗神经孔横径测量值为(2.32±0.25)mm。异常组9例10耳均表现为蜗神经孔狭窄,8耳筛孔区基底部骨性裂隙未显示;2耳筛孔区基底部骨性裂隙存在。合并内听道狭窄4例,前庭与水平半规管异常1例。异常组蜗神经孔经线测量结果:蜗神经孔横径最大1.5 mm,最小0.9 mm。结论蜗神经孔发育不良的典型CT 表现为蜗神经孔狭窄,筛孔区基底部骨性裂隙消失。蜗神经孔发育不良可能是耳蜗发育不良的一种亚型。
Objective To observe the CT findings of hypoplasia of cochlear nerve foramen. Methods CT findings of cochlear nerve foramen were observed in 50 volunteers （ 100 ears） and in 9 cases with hypoplasia of cochlear nerve foramen. The width of the bony canal for the cochlear nerve were measured in both groups. Results The fissure in the cribriform area were seen in every volunteers. The width of the bony canal for the cochlear nerve was （2. 32 ± 0. 25 ） mm in normal group. The stenosis of cochlear nerve foramen were shown in 9 cases （ 10 ears） ,the lacking of fissure in the cribriform area were seen in 8 ears, while the fissure were shown in 2 cases. The stenosis of internal auditory canal was shown in 4 cases. Abnormality of vestibule and horizontal semicircular canal was shown in one case. The maximum value of the width of the bony canal for the cochlear nerve was 1.5 mm, the minimum value was 0.9 mm. Conclusions The typical CT findings of hypoplasia of cochlear nerve foramen were stenosis of cochlear nerve foramen, the lacking of fissure in the cribriform area and cochlear nerve foramen without helix shape. The hypoplasia of cochlear nerve foramen may be a subtype of cochlear dysplasia.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2007年第6期588-592,共5页
Chinese Journal of Radiology
