Nyland H, Krogness K G
Acta Neurochir (Wien). 1978;40(3-4):233-42. doi: 10.1007/BF01774749.
The clinical and neuroradiological findings in five patients with Chiari Type 1 malformation presenting symptoms in adult life are presented. New posterior fossa ratio methods have been applied to this material. The posterior cranial fossae are demonstrated to be small, and the most significant deviation from normal gave the ratio h/Tw: posterior fossa height in proportion to Twining's line. The implications of these findings are discussed in relation to the static and dynamic factors that are operating in the development of neurological symptoms in Chiari type 1 malformation. A final discussion is given comparing the Chiari type 1 malformations to meningo-myelocele. The findings using posterior fossa ratio methods may strengthen the indications for suboccipital craniectomy in these patients.
本文介绍了5例成年期出现症状的Chiari I型畸形患者的临床和神经放射学表现。新的后颅窝比率方法已应用于该病例资料。结果显示后颅窝较小，与正常情况的最大显著偏差为h/Tw比率：后颅窝高度与Twining线的比例。结合Chiari I型畸形神经症状发展过程中的静态和动态因素，对这些发现的意义进行了讨论。最后对Chiari I型畸形与脊髓脊膜膨出进行了比较讨论。使用后颅窝比率方法的研究结果可能会增强这些患者枕下颅骨切除术的指征。
