髁后管
The posterior condylar canal.
作者信息
Ginsberg L E
机构信息
Department of Radiology, Bowman Gray School of Medicine, Winston-Salem, NC 27157-1088.
出版信息
AJNR Am J Neuroradiol. 1994 May;15(5):969-72.
PURPOSE
To assess the prevalence and appearance of the posterior condylar canal using high-resolution CT.
METHODS
One hundred twenty-three high-resolution temporal bone CT examinations were retrospectively reviewed for the presence or absence of the posterior condylar canal. Thirty-four gross skulls were also examined.
RESULTS
The posterior condylar canal was identified on CT bilaterally in 31% of the final study group and unilaterally in 50%. On gross specimens, this structure was identified in 55.9% bilaterally and 17.6% unilaterally. The posterior condylar canal, when present, is readily identifiable in a predictable location. The imaging appearance of this structure is dependent on its relationship to the angle of scanning.
CONCLUSION
The posterior condylar canal is among the largest emissary foramina in the human skull. Recognition of this structure and its role as an alternative source of venous drainage from the brain will help avoid misinterpretation during CT examination.
目的
使用高分辨率CT评估髁后管的发生率及表现。
方法
回顾性分析123例高分辨率颞骨CT检查，以确定是否存在髁后管。还对34个完整颅骨进行了检查。
结果
在最终研究组中，31%的患者双侧髁后管在CT上被识别，50%的患者单侧被识别。在大体标本上，55.9%的标本双侧可识别该结构，17.6%的标本单侧可识别。髁后管若存在，在可预测的位置很容易识别。该结构的影像学表现取决于其与扫描角度的关系。
结论
髁后管是人类颅骨中最大的导静脉孔之一。认识到该结构及其作为脑静脉引流替代途径的作用，将有助于在CT检查期间避免误诊。
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