caa a22 4500 445833432 CHVBK 20180317145323.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s00586-010-1480-0 doi (NATIONALLICENCE)springer-10.1007/s00586-010-1480-0 Non-traumatic posterior atlanto-occipital joint dislocation [Elektronische Daten] [Yasuhiko Takechi, Haku Iizuka, Yasunori Sorimachi, Tsuyoshi Ara, Masahiro Nishinome, Kenji Takagishi] This report presents a case of non-traumatic posterior atlanto-occipital dislocation. A 36-year-old female was referred with a history of numbness of the extremities, vertigo and neck pain for 1year. The patient had no history of trauma. The axial rotation of range of motion of the cervical spine was severely restricted. A lateral cervical radiograph in the neutral position demonstrated a posterior atlanto-occipital dislocation. A coronal view on a computed tomography (CT) reconstruction image showed a loss of angle of the bilateral atlanto-occipital joint, and a sagittal reconstruction view of CT images also demonstrated flatness of atlanto-occipital joint. Instrumented occipito-cervical fusion was performed after reduction. A lateral cervical radiograph in the neutral position 1year after surgery showed the reduction of atlanto-occipital joint, moreover, it was maintained even in an extended position. The patient had neurologic improvement after surgery. Flatness of the bilateral atlanto-occipital joint may have induced this instability. Occipital-cervical fusion was chosen in the present case since the patient showed restricted axial rotation of the neck before surgery. The surgery improved the preoperative symptoms including the function of cervical spine evaluated by JOACMEQ. Springer-Verlag, 2010 Atlanto-occipital joint nationallicence Subluxation nationallicence Takechi Yasuhiko Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut Iizuka Haku Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut Sorimachi Yasunori Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut Ara Tsuyoshi Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut Nishinome Masahiro Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut Takagishi Kenji Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut European Spine Journal Springer-Verlag 20(2011-07-01), 172-175 0940-6719 20<172 2011 20 586 https://doi.org/10.1007/s00586-010-1480-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00586-010-1480-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Takechi Yasuhiko Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut NATIONALLICENCE 700 1- Iizuka Haku Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut NATIONALLICENCE 700 1- Sorimachi Yasunori Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut NATIONALLICENCE 700 1- Ara Tsuyoshi Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut NATIONALLICENCE 700 1- Nishinome Masahiro Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut NATIONALLICENCE 700 1- Takagishi Kenji Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, 371-8511, Maebashi, Gunma, Japan aut NATIONALLICENCE 773 0- European Spine Journal Springer-Verlag 20(2011-07-01), 172-175 0940-6719 20<172 2011 20 586 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer