Davis S W, Levy L M, LeBihan D J, Rajan S, Schellinger D
Department of Radiology, Georgetown University Medical Center, Washington, DC 20007.
Radiology. 1993 May;187(2):445-8. doi: 10.1148/radiology.187.2.8475288.
It is often difficult for the radiologist to determine if a given sacral meningeal cyst is causing symptoms. Radiographic criteria for identifying cysts likely to be symptomatic are needed. Using conventional magnetic resonance (MR) imaging along with a specifically designed flow-sensitive sequence, the authors characterized 24 cysts (19 patients) with respect to diameter and communication with the subarachnoid space. They found no significant difference in size between symptomatic and asymptomatic cysts (P > .05) but did observe a clear-cut disparity in the context of communication: Five of five asymptomatic cysts were shown to communicate on MR flow studies, while seven of seven symptomatic cysts were not shown to communicate. The authors propose that flow-sensitive MR imaging is useful in differentiating communicating from noncommunicating sacral meningeal cysts and that this information may be of value in classifying these lesions as more or less likely to be symptomatic.
放射科医生常常难以确定某一给定的骶部脑脊膜囊肿是否正在引起症状。需要有识别可能出现症状的囊肿的影像学标准。作者使用传统磁共振（MR）成像以及专门设计的血流敏感序列，对24个囊肿（19例患者）的直径以及与蛛网膜下腔的连通情况进行了特征描述。他们发现有症状和无症状囊肿在大小上无显著差异（P >.05），但在连通情况方面确实观察到了明显差异：在MR血流研究中，5个无症状囊肿中有5个显示有连通，而7个有症状囊肿中没有一个显示有连通。作者提出，血流敏感MR成像有助于区分连通性骶部脑脊膜囊肿和非连通性骶部脑脊膜囊肿，并且这些信息对于将这些病变分类为或多或少可能出现症状可能具有价值。
