Expert's comment concerning Grand Rounds case entitled 'Syringomyelia with irreducible atlantoaxial dislocation, basilar invagination and Chiari I malformation' (by Shenglin Wang, Chao Wang, Ming Yan, Haitao Zhou, Liang Jiang).

摘要

The authors describe a case of a 27-year-old woman with a 5-year history of progressive quadriparesis caused by gradual decompensation of cranio-vertebral junction (CVJ) anomaly. The bone anomalies—assimilation of atlas, syn-ostosis of C2-3 and most probably also platybasia were complicated by anterior atlanto-axial dislocation (AAD) and basilar invagination (BI) concomitantly with Chiari I malformation and cervical syringomyelia. Due to lack of movement on dynamic flexion-extension films and no evidence of reduction after 10 min of traction under general anesthesia, the AAD was considered irreducible (IAAD) as described by Wang et al. [9].