坐骨股骨撞击综合征的MRI表现

目的:总结坐骨股骨撞击综合征(IFIS)的MRI表现,提高对该病的认识。资料与方法:回顾性分析经我院确诊的IFIS 84个髋关节(病例组)及正常志愿者髋关节116个(对照组)的MRI图像,通过轴位T1WI序列测量两组人群坐骨股骨间隙(IFS)、股方肌间隙(QFS)、坐骨结节间距,并通过质子加权脂肪抑制序列观察股方肌形态及信号。结果:独立样本t检验分析表明对照组IFS及QFS((2.36±0.47)cm、(1.58±0.39)cm)明显大于病例组((1.56±0.42)cm、(0.89±0.24)cm),对照组坐骨结节间距((10.51±1.53)cm)小于病例组((11.39±1.01)cm),两组之间差异均有统计学意义(P <0.05)。Pearson相关分析表明髋关节IFS与QFS之间呈显著正相关,r=0.813,P <0.05;坐骨结节间距与IFS之间存在负相关关系,r=-0.263,P <0.05。在IFIS患者中,股方肌均有不同程度的变形及水肿。所测全部数据中,中青年组IFS、QFS宽度((2.09±0.55)cm,(1.32±0.47)cm)均大于老年组((1.90±0.58)cm,(1.19±0.39)cm),两组之间差异有统计学意义(P <0.05);而两组之间坐骨结节间距无显著性差异。结论:IFS和QFS变窄,同时股方肌出现变形、水肿,是坐骨股骨撞击综合征的典型MRI表现。

The MRI Findings of Ischiofemoral Impingement Syndrome

Objective: To summarize the MRI findings of ischiofemoral impingement syndrome (IFIS), promote the recognition of this disease. Materials and Methods: The MRI images of 84 hips with IFIS (case group) confirmed in our hospital and 116 normal hips (control group) were retrospectively analyzed. Ischiofemoral space (IFS), quadratus femoris space (QFS), distance between sciatic tuberosity were measured on the axial T1WI MR images, and the morphological and signal of the quadratus femoris muscle were observed on the axial PDWI-FS images. Results: Independent sample t-test analysis indicate the IFS and QFS ((2.36±0.47) cm, (1.58±0.39) cm) of control group were significantly higher than that of case group ((1.56±0.42) cm, (0.89±0.24) cm), and the distance between sciatic tuberosity of control group ((10.51±1.53) cm) was lower than that of case group ((11.39±1.01) cm), and the differences between the two groups were statistically significant (P<0.05). Pearson correlation analysis indicate there was a significant positive correlation between IFS and QFS, r=0.813, P<0.05; There was a negative correlation between distance between sciatic tuberosity and IFS, r=-0.263, P<0.05. In the IFIS patients, the quadratus femoris muscle showed different degrees of deformation and edema. In the whole data, the IFS and QFS in the young and middle-aged group ((2.09±0.55) cm, (1.32±0.47) cm) were all higher than that of the elderly group ((1.90±0.58) cm, (1.19±0.39) cm), P<0.05; and there was no significant difference in the distance between sciatic tuberosity between the two groups. Conclusion: The narrowing of IFS and QFS, and the deformation and edema of quadratus femoris, are the typical MRI findings of ischiofemoral impingement syndrome.