摘要
目的 :探讨枕大孔畸形的影像学表现。方法 :对 6 8例枕大孔畸形的传统X线平片及CT图像进行分析、研究。结果 :单纯寰枕融合畸形 8例 ,X线平片显示寰枕融合者 5例。X线平片测量均误诊为颅底凹陷症。单纯颅底凹陷症 2 9例 ,X线平片及CT测量均做出正确诊断。颅底凹陷症合并寰枕融合者 31例 ,X线平片显示寰椎融合 19例 ,CT均显示融合。CT、X线平片测量均符合颅底凹陷症。 2 0例行脑池造影CT扫描 ,全部病例均示枕大池狭小 ,18例延脑后部显示小脑扁桃体压迹 ,其中延脑与小脑扁桃体间蛛网膜下腔狭窄者 6例 ,消失者 12例 ,小脑扁桃体疝入椎管内者 17例 ,颈髓有小脑扁桃体压迹者 14例。结论 :传统X线平片可显示枕大孔畸形的部分骨性特征 ,CT能显示枕大孔畸形的骨及软组织改变 。
Objective:To study the image findings of foramen magnum malformation.Methods:Sixty-eight patients of the foramen magnum malformation were studied with plain film and CT.Results:The plain film indicate occipitalization in 5 of 8 pationts with occipitalization malformation,however,all the patients were misdiagnosed into basilar impression on plain film.The occipitalization were diagnosed by plain and CT in 29 patients.The occipitalization were showen on CT in 31 the patients with basilar depression accompanied by occipitalization were showen on CT in 31 the patients with basilar depression accompanied by occipitalization malfamation,on plain film in 19 of 31 patients.All the patients were diagnosed on CT and plain film.The brain stem were compressed by tonsilla cerebelli in 18 patients.The narrow of subaracnoid space between brain and tonsila cerebelli were seen in 6 patients,no subaracnoid space were seen in 12 patients.The spinal cord were compressed by tonsilla cerebelli which is extended downward to the spinal canal in 14 of 17 patients with herniation of tosnilla cerebelli.Conclusion:CT is superior to plain film in shown the characteristics of foramen magnum malformation.
出处
《医学影像学杂志》
2001年第3期170-172,共3页
Journal of Medical Imaging
关键词
枕大孔畸形
CT
诊断
Foramen magnum,Malformation
Tomography,X-ray computed
