Macpherson P, Teasdale E
Department of Neuroradiology, Southern General Hospital, Glasgow, Scotland.
Neuroradiology. 1988;30(6):506-10. doi: 10.1007/BF00339691.
The reported prevalence of 5th ventricles based on air studies varies from 1-12% and ranges up to 60% as an autopsy finding. The prevalence of what is usually an incidental anomaly has not been determined by computed tomography (CT). 5th ventricles are however known to be more common in brain damaged boxers and with the introduction of compulsory CT scanning for certain boxers it is necessary to know what significance to attach to the finding of a cavum in these individuals. To ascertain the prevalence and morphology of 5th ventricles as detected by CT in the population, a thousand consecutive scans were analysed for the presence or absence of a 5th ventricle and other associated midline developmental abnormalities and correlations made with any pathology found. A 5th ventricle was present in 5.5% of the group and in most cases was less than 3 mm wide. An apparent association with other pathology was found only in patients under the age of 15. A 6th ventricle was found in 0.5% while a cavum velum interpositum was present in 9.5%. The isolated finding of a small 5th ventricle on the CT scan of a young active boxer almost certainly represents a persistent congenital anomaly of no significance.
基于气脑造影研究报告的第五脑室发生率为1%至12%，而尸检发现的发生率高达60%。计算机断层扫描（CT）尚未确定这种通常为偶然发现的异常情况的发生率。然而，已知第五脑室在脑部受损的拳击手中更为常见，并且随着对某些拳击手强制进行CT扫描，有必要了解在这些个体中发现透明隔腔有何意义。为了确定CT检测到的人群中第五脑室的发生率和形态，对连续一千次扫描进行分析，以确定是否存在第五脑室以及其他相关的中线发育异常，并与发现的任何病理情况进行关联分析。该组中5.5%的人存在第五脑室，大多数情况下其宽度小于3毫米。仅在15岁以下的患者中发现与其他病理情况存在明显关联。0.5%的人发现有第六脑室，9.5%的人存在中间帆腔。在年轻活跃拳击手的CT扫描中单独发现小的第五脑室几乎肯定代表一种无意义的持续性先天性异常。
