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目的 研究Chiari畸形(CM)/脊髓空洞症(SM)患者小脑扁桃体下疝的程度与空洞大小之间的关系.并探讨此综合征的发病规律。方法 回顾性分析我院MRI室自1992～1996年所做的CM/SM患者的术前MRI资料,测量小脑扁桃体下疝的程度(L)、空洞的长度(空洞沿椎体的节段数)和宽度、对所有的计量资料进行统计学处理。结果 162例,其中男68例,女94例,年龄14～61岁,平均37岁。L<5 mm,占13.58％,L在5～15 mm,占75.31％,L>15 mm,占11.11％。小脑扁桃体下疝的程度与空洞长度的相关系数为:r1=-0.096 1,P=0.351 7,与宽度的相关系数为:r2=-0.005 5,P=0.957 8。结论 小脑扁桃体下疝长度在5～15 mm之间者易伴发脊髓空洞,小脑扁桃体下疝的长度与空洞的大小无显著的线性相关。
Objective To study the relationship between the degree of cerebellar tonsillar herniation and the size of the cavity in Chiari malformation (CM) / syringomyelia (SM) and to explore the pathogenesis of this syndrome. Methods The MRI data of CM / SM patients in our hospital from 1992 to 1996 were retrospectively analyzed. The degree of inferior cerebellar tonsillar herniation (L), the length of the cavity (the number of voids along the vertebral body) and Width, all the measurement data for statistical processing. Results 162 cases, 68 males and 94 females, aged 14 to 61 years, mean 37 years. L <5 mm, accounting for 13.58%, L in 5 ~ 15 mm, accounting for 75.31%, L> 15 mm, accounting for 11.11%. The correlation coefficient between the extent of cerebellar tonsil hernia and the length of the cavity was: r1 = -0.096 1, P = 0.351 7, and the correlation coefficient with width was r2 = -0.005 5, P = 0.957 8. Conclusions The length of inferior cerebellar tonsil herniation is between 5-15 mm, and the length of the cerebellar tonsillar hernia is not significantly linear with the size of the cavity.