%0 Journal Article
%T C1每C2 fusion with absence of C1 posterior arch and presence of C2 high
%A Chee Kidd Chiu
%A Chris Yin Wei Chan
%A Mohd Shahnaz Hasan
%A Muhammad Lutfi Abdul Rashid
%A Mun Keong Kwan
%A Tat Seng Wong
%J Journal of Orthopaedic Surgery
%@ 2309-4990
%D 2019
%R 10.1177/2309499019840763
%X The presence of anatomical anomalies such as absence of C1 posterior arch and presence of C2 high-riding vertebral artery may not allow a conventional C1每C2 fusion, and this patient will require occipitocervical fusion. A 62-year-old lady presented with cervical myelopathy. CT scan demonstrated an os odontoideum with C1每C2 dislocation. The posterior arch of atlas on right C1 vertebra was absent, and there was high-riding vertebral artery on left C2. MRI revealed severe cord compression with cord oedema. The chronic atlantoaxial dislocation was reduced successfully with skeletal traction. Hybrid C1每C2 fusion augmented with autogenous local bone graft with corticocancellous iliac crest bone graft was performed to avoid an unnecessary occipitocervical fusion. She was stable throughout surgery and discharged 6 days later. CT scan 6 months post-operation showed a solid posterior fusion mass. Hybrid C1每C2 fusion can be performed to avoid occipitocervical fusion despite presence of abnormal anatomy at C1 and C2 vertebrae
%K atlantoaxial dislocation
%K C1每C2 fusion
%K high-riding vertebral artery
%K laminar screw
%K lateral mass screw
%K os odontoideum
%K transarticular screw
%U https://journals.sagepub.com/doi/full/10.1177/2309499019840763