Rosenbaum D M, Blumhagen J D, King H A
AJR Am J Roentgenol. 1986 Jun;146(6):1269-72. doi: 10.2214/ajr.146.6.1269.
Atlantooccipital instability is an uncommon and usually lethal result of major trauma. Nontraumatic cases of instability at this site are rare. We report the findings in two children with Down syndrome who have striking atlantooccipital subluxation demonstrated on flexion and extension radiographs. Since there is increasing radiologic evaluation of cervical spine stability in patients with Down syndrome who wish to participate in athletic activities, the status of the atlantooccipital joint needs careful assessment, especially after cervical fusion for C1-C2 instability.
寰枕关节不稳是严重创伤后罕见且通常致命的后果。该部位非创伤性不稳病例罕见。我们报告了两名唐氏综合征患儿的检查结果，其屈伸位X线片显示有明显的寰枕半脱位。鉴于越来越多的唐氏综合征患者希望参加体育活动，其颈椎稳定性需接受影像学评估，因此寰枕关节的状况需要仔细评估，尤其是在因C1-C2不稳进行颈椎融合术后。
