Willinsky R A, Grosman H, Cooper P W, Kassel E E, Fazl M
Department of Radiological Sciences, University of Toronto, Ontario.
Can Assoc Radiol J. 1988 Mar;39(1):21-5.
The radiological findings in 10 patients with sacral cysts were retrospectively reviewed and classified. The cysts were an incidental finding on computed tomography (CT) in four patients. The expansion of sacral foramina or the sacral canal as seen on plain films suggested the diagnosis in three. In only two of the five patients who had myelograms did the cysts fill with contrast. In eight, CT showed remodelling and expansion of the sacral foramina, or the canal, or both, by a homogeneous mass with a density of 5-20 Hounsfield units. One of the patients underwent magnetic resonance imaging which confirmed that the lesion was fluid-filled. We found that sacral cysts can be either symptomatic or asymptomatic, that they may or may not communicate with the subarachnoid space, and that they have a characteristic CT appearance.
对10例骶骨囊肿患者的放射学检查结果进行回顾性分析并分类。4例患者的囊肿是在计算机断层扫描（CT）检查时偶然发现的。3例患者通过X线平片上显示的骶孔或骶管扩大得以诊断。在接受脊髓造影的5例患者中，只有2例囊肿内充满造影剂。8例患者的CT显示，骶孔或骶管或两者均被密度为5-20亨氏单位的均匀肿块重塑和扩大。其中1例患者接受了磁共振成像检查，证实病变为液性。我们发现，骶骨囊肿可以有症状或无症状，可以与蛛网膜下腔相通或不相通，并且具有特征性的CT表现。
