Posterior Semicircular Canal Dehiscence: A Histopathologic Human Temporal Bone Study
Posterior Semicircular Canal Dehiscence: A Histopathologic Human Temporal Bone Study
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DOI：
10.1097/mao.0b013e3181eb3309
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发表时间：
2010-09-01
影响因子：
2.1
通讯作者：
Paparella, Michael M.
中科院分区：
文献类型：
--
作者：
Nomiya, Shigenobu;Cureoglu, Sebahattin;Paparella, Michael M.
背景资料：目的：探讨后半规管裂孔、后半规管上覆薄骨、后半规管与后颅窝距离正常发育的发生率。本文测量了1,051例成人颞骨后半规管与后颅窝之间的最短距离（557例），距离小于0.1mm的颞骨进行评价。结果：1,051例颞骨中，后半规管与后颅窝的距离小于0.1mm者23例，占2.2%。2例颞骨（0.2%）出现后半规管裂开，2例颞骨出现薄骨微骨折;但相关临床症状未得到证实。儿童后半规管与后颅窝的距离随年龄增长而增加（p = 0.68，p < 0.01）。结论：后半规管裂的病理组织学发生率低于以往的X线报道。后半规管的裂开可能是由于发育异常。在我们的研究中，没有一个距离小于0.1 mm的病例出现与椎管裂开综合征相关的明显症状。除了骨骼变薄之外，可能还需要其他因素才能引起临床表现。
Background: Posterior semicircular canal dehiscence has been shown to cause ear symptoms.Objective: To evaluate the incidence of dehiscence of the posterior semicircular canal, thin bone overlying the posterior semicircular canal, and the normal development of the distance between the posterior semicircular canal and posterior cranial fossa.Methods: The shortest distance between the posterior semicircular canal and posterior cranial fossa was measured in 1,051 adult human temporal bones (557 cases), and temporal bones with a distance less than 0.1 mm were evaluated. The shortest distance also was measured in 4 fetal temporal bones (2 cases) and 110 temporal bones from children.Results: Of the 1,051 temporal bones, 23 temporal bones (2.2%) had a distance less than 0.1 mm between the posterior semicircular canal and posterior cranial fossa. Two temporal bones (0.2%) had posterior semicircular canal dehiscence, and 2 temporal bones had microfractures in the thin bone; however, related clinical symptoms were not confirmed. In children, the distance between the posterior semicircular canal and the posterior cranial fossa increased with age (p = 0.68, p < 0.01).Conclusion: The histopathologic incidence of posterior semicircular canal dehiscence was lower than the previous radiographic reports. The dehiscence of the posterior semicircular canal may be due to a developmental anomaly. In our study, none of the cases with a distance less than 0.1 mm had apparent symptoms related to canal dehiscence syndrome. Other factors, in addition to thinning of the bone, may be required to cause the clinical manifestations.