关键词: 骶尾部;蛛网膜;囊肿;医学影像学;临床诊断学

    摘 要:目的 探讨骶管内蛛网膜囊肿的影像学和临床特点，以助于临床诊断. 方法 观察24例经手术证实的骶管内蛛网膜囊肿患者的X线片，CT，造影后CT，MRI等影像学资料中的影像改变，分析该组患者的临床表现特点及手术中的病理特点. 结果 X线片，CT，及MRI中均可显示出骶骨的骨性改变，造影后CT囊肿内造影剂显影，MRI可以清楚的显示出囊肿呈长T1及T2信号，信号强度与脑脊液一致.临床症状以骶管内神经受压表现为主，囊肿与硬膜囊一般有交通孔. 结论 MRI是最好的影像学诊断方法;骶管内蛛网膜囊肿的发生是由于先天的硬膜缺陷所致.

    Imaging and clinical features of arachnoid cysts in sacral canal:Analysis of24cases

    LI Xin-Kui，TAO Hui-Ren，WANG Quan-Ping，LI Ming-Quan，LIU Ji-Zhong

    Institute of Orthopaedics of Chinese PLA，Xijing Hospital，Fourth Military Medical University，Xi'an710033，China

    Keywords:sacrococcygeal region;arachnoid;cyst;imaging medicine;clinical diagnosis

    Abstract:AIM To study characteristics of the images and clinical features of arachnoid cyst in the sacral canal in order to improve our ability to diagnose it.METHODS The imag-ing changes including X-ray，CT，CT following myelography and MRI were assessed in24patients with operation-proved arachnoid cysts in sacral canal，and their clinical characteris-tice and pathologies were asloanalysed.RESULTS Bone erosion sometimes was observed in X-ray ......