Redon Hervé, Iacona C, Lot G, Laredo J D
Hotel-Dieu, Radiology Department, Nantes, France.
Spine (Phila Pa 1976). 2004 Mar 15;29(6):E113-8. doi: 10.1097/01.brs.0000115131.35545.4d.
Report of an 11-year-old girl with a left atlantoaxial rotatory subluxation and ankylosis found 20 months after she sustained a cervical injury.
To describe the radiographic characteristics of this rare deformity assessed with a combination of spiral CT scan with multiplanar three-dimensional reformations and functional CT scan.
Atlantoaxial rotatory subluxation is a well-known condition, but its association with lateral C1-C2 ankylosis has not been reported to our knowledge.
For a complete assessment of the dislocation, a combined morphologic volumetric and functional CT study was performed.
Spiral CT showed an atlantoaxial rotatory subluxation with lateral C1-C2 ankylosis. CT study also demonstrated a lateral C1-C2 subluxation and an ipsilateral occipitoatlantal subluxation. Cervical MRI showed no spinal cord compression despite the seriousness of the dislocation process.
Whereas "classic" spiral study with multiplanar and three-dimensional reformations allows precise assessment of relationships between the upper cervical vertebrae, as well as bony changes, a functional CT study is essential for cervical biomechanic assessment of rotational instabilities of the craniovertebral junction and upper cervical spine.
报告一名11岁女孩，在颈椎损伤20个月后出现左寰枢椎旋转性半脱位和融合。
描述通过螺旋CT扫描结合多平面三维重建及功能CT扫描评估这种罕见畸形的影像学特征。
寰枢椎旋转性半脱位是一种已知病症，但据我们所知，其与C1-C2侧方融合的关联尚未见报道。
为全面评估脱位情况，进行了形态学容积和功能CT联合研究。
螺旋CT显示寰枢椎旋转性半脱位伴C1-C2侧方融合。CT研究还显示C1-C2侧方半脱位及同侧枕寰关节半脱位。尽管脱位过程严重，但颈椎MRI显示无脊髓受压。
虽然“经典”的螺旋扫描结合多平面和三维重建可精确评估上颈椎之间的关系以及骨质变化，但功能CT研究对于颅颈交界区和上颈椎旋转不稳的颈椎生物力学评估至关重要。
