Nägele T, Klose U, Grodd W, Opitz H, Schick F, Steinbrecher A, Voigt K
Department of Neuroradiology, University of Tübingen, Germany.
Neuroradiology. 1996 Aug;38(6):572-4. doi: 10.1007/BF00626102.
We report a man with a ruptured intracranial dermoid cyst, suffering from headache, nausea, vomiting and a generalised seizure. MRI was performed before and 2 weeks after surgical resection. On T1-weighted images the tumour gave high signal, as did fatty material in the frontal and parietal brain sulci. Identification of this hyper-intense material as lipids was possible by chemical-shift-selective 3D gradient-echo imaging, which provided excellent contrast between the subarachnoid lipids and the adjacent normal brain, with a good spatial resolution. Possible complications of subarachnoid and intraventricular lipid particles after dermoid cyst rupture are discussed and the diagnostic value of 3 D chemical-shift-selective additional to conventional T-1-weighted spin-echo images in identification of even small amounts of fat is emphasised.
我们报告了一名患有颅内皮样囊肿破裂的男性，他出现头痛、恶心、呕吐和全身性癫痫发作。在手术切除前及切除后2周进行了MRI检查。在T1加权图像上，肿瘤呈高信号，额叶和顶叶脑沟内的脂肪物质也是如此。通过化学位移选择性3D梯度回波成像能够将这种高强度物质识别为脂质，该成像在蛛网膜下腔脂质与相邻正常脑之间提供了出色的对比度，且具有良好的空间分辨率。本文讨论了皮样囊肿破裂后蛛网膜下腔和脑室内脂质颗粒可能出现的并发症，并强调了在识别少量脂肪方面，除传统T1加权自旋回波图像外，3D化学位移选择性成像的诊断价值。
