A case of fourth atlanto-axial facet joint: anatomical description.

作者信息

Wang Xing-Wen, Jian Feng-Zeng, Ling Feng

机构信息

Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, 45 Changchun St, Beijing, 100053, People's Republic of China.

Department of Neurosurgery, Beijing Hospital, Beijing, 100730, People's Republic of China.

出版信息

Eur Spine J. 2016 May;25 Suppl 1:104-6. doi: 10.1007/s00586-015-4184-7. Epub 2015 Aug 13.

DOI:10.1007/s00586-015-4184-7

PMID:26266770

Abstract

PURPOSE

To report a rare fourth atlanto-axial joint.

METHODS

A cadaveric specimen of a young male adult from occiput to C4 was dissected for anatomical study of craniocervical region. A true fourth atlanto-axial joint was confirmed. Its morphological characteristics were described.

RESULTS

The fourth atlantoaxial joint is rarely seen. The possible embryogenesis is discussed. This case raises an anatomical possibility of a new variant in this region.

CONCLUSIONS

A unique case with an anatomically proven fourth atlantoaxial joint is reported. This anomaly can lead to misdiagnosis. CT scan coupled with MRI can facilitate accurate diagnosis.

摘要