骶髂关节解剖变异的MR表现  

MR anatomical variation of sacroiliac joints

作　　者：赵衡[1] 胡蓉[1] 刘进才[1] 罗光华[1] 卿伟鹏[1] 彭昭杰 Zhao Heng;Hu Rong;Liu Jincai;Luo Guanghua;Qing Weipeng;Peng Zhaojie(Department of Radiology,the First Affiliated Hospital,University of South China,Hengyang 421000,Hunan Province,China)

机构地区：[1]南华大学附属第一医院放射科

出　　处：《中国组织工程研究》2019年第28期4516-4521,共6页Chinese Journal of Tissue Engineering Research

基　　金：湖南省科技计划项目(2017SK50203),项目负责人:赵衡;湖南省自然科学基金项目(14JJ2086),项目负责人:赵衡;湖南省自然科学基金项目(2017JJ2225),项目负责人:刘进才;湖南省自然科学基金项目(2018JJ2357),项目负责人:罗光华~~

摘　　要：背景:以往研究仅见X 射线或CT 对骶髂关节解剖变异的影像描述,而MRI 对其尚无统一具体描述。目的:描述骶髂关节解剖变异在MRI 上的特征表现,并观察可能具有误导性的MR 影像特征表现。方法:回顾性分析南华大学附属第一医院近2 年拍摄的骶髂关节MRI 影像资料。由于目标之一是阐述与骶髂关节解剖变异相关的潜在误导性水肿或结构变化,因此排除了符合国际脊柱关节炎评价工作组诊断标准的患者,以确保信号强度变化与骶髂关节炎无关。结果和结论:①最终纳入患者为158 例,其中有40 例患者出现单侧或双侧骶髂关节的解剖变异,髂骶复合体、骶骨缺损分别为17 及22 例,孤立性骨质增生1 例,骶髂关节畸形改变为23 例,同一患者可出现2种骶髂关节解剖变异,未发现副骶髂关节和未愈合骨化中心病例;②畸形改变骶髂关节往往观察到对面骨的结构和/或水肿变化,骶髂复合体和骶骨缺损表现可能与沿其骨表面突出的血管有关;③结果显示,骶髂关节的解剖变异在MRI 上相对常见,尤其是在女性中。这些变异可能会伴随信号强度的改变,这种信号强度的改变本质上不一定是炎症性的,也可能是先天性的。BACKGROUND: In previous studies, only X-ray or CT imaging was used to describe the anatomical variations of the sacroiliac joint, but MRI has not provided a unified and specific description. OBJECTIVE: To describe the MRI characteristics of anatomical variations of sacroiliac joints and observe the potentially misleading MR imaging characteristics. METHODS: The MRI findings of the First Affiliated Hospital, University of South China in the past two years were retrospectively analyzed. One of the objectives was to describe potentially misleading edema or structural changes associated with anatomical variations in sacroiliac joints. Patients meeting the Assessment in Ankylosing Spondylitis International Society criteria were excluded in this study to ensure that signal intensity changes were not associated with sacroiliac arthritis. RESULTS AND CONCLUSION:(1) 158 patients were finally included in the study, among which 40 patients showed unilateral or bilateral anatomical variation in sacroiliac joints. Iliosacral complex and sacral defect were found in 17 cases and 22 cases respectively, solitary hyperosteogeny in 1 case, and sacroiliac joint deformity in 23 cases. There are two kinds of anatomical variations of sacroiliac joints in the same patient. No cases of accessory sacroiliac joints and unhealed ossification center were found.(2) Abnormal changes in the structure and/or edema of the opposite bone were often observed in the sacroiliac joints. The appearance of sacroiliac complex and sacral defects may be related to the presence of blood vessels protruding along the surface of the bone.(3) The results showed that anatomical variations of sacroiliac joints were relatively common on MRI, especially in women. These variations may be accompanied by changes in signal strength that are not necessarily inflammatory in nature but may be congenital.

关 键 词：骶髂关节 解剖变异 磁共振成像 骨髓水肿 信号强度 髂骶复合体 骶骨缺损 

分 类 号：R459.9[医药卫生—治疗学] R445.2[医药卫生—临床医学]