Cakirer S
Istanbul Sisli Etfal Hospital, Department of Radiology, Neuroradiology Section, Atasehir-Istanbul, Turkey.
Acta Radiol. 2004 Jul;45(4):460-3. doi: 10.1080/02841850410005453.
Arachnoid cysts are benign intra-arachnoid collections of cerebrospinal fluid and comprise around 1% of the intracranial masses. Unless complicated with hemorrhage, they are similar to cerebrospinal fluid in signal intensity in most cases. Diffusion-weighted magnetic resonance imaging (MRI) reveals that they have no water restriction and distinguishes them from epidermoid cysts, which show water restriction. Arachnoid cysts of the craniospinal junction are rare lesions, with only seven cases reported in the literature. Imaging findings of all craniospinal arachnoid cysts reveal a large posterior fossa arachnoid cyst extending through the foramen magnum to the level of the upper spine. We present MRI findings of a 27-year-old female patient with a craniospinal arachnoid cyst.
蛛网膜囊肿是脑脊液在蛛网膜内的良性聚集，约占颅内肿块的1%。除非合并出血，大多数情况下它们在信号强度上与脑脊液相似。扩散加权磁共振成像（MRI）显示它们不存在水扩散受限，这将它们与表现为水扩散受限的表皮样囊肿区分开来。颅颈交界区蛛网膜囊肿是罕见病变，文献中仅报道过7例。所有颅颈交界区蛛网膜囊肿的影像学表现均显示一个大的后颅窝蛛网膜囊肿经枕骨大孔延伸至上段脊柱水平。我们报告一名27岁患有颅颈交界区蛛网膜囊肿女性患者的MRI表现。
