MRI在多发性肌炎/皮肌炎诊断中的价值

目的:探讨MRI在多发性肌炎(PM)/皮肌炎(DM)诊断中的应用价值。方法:回顾分析临床资料完整的24例PM/DM患者的肌肉及皮下软组织MR图像,其中PM 16例,DM 8例。检查序列包括FSE T1WI、FSE T2WI、fs T2WI。扫描双侧大腿,常规冠状位、矢状位及横轴位平扫。结果:24例PM/DM中19例大腿肌肉MRI上存在异常,表现为:肌肉炎性水肿16例,肌筋膜炎10例,皮下软组织水肿6例,2例肌肉萎缩。结论:MRI在PM/DM诊断中有重要应用价值,肌肉和皮下组织炎性水肿是PM/DM患者最常见的MRI表现。MRI fs T2WI序列能更好地检出炎性病变。

Diagnostic value of MRI in polymyositis and dermatomyositis

Objective：To evaluate the significance of magnetic resonance imaging（MRI） in diagnosis of dermatomyositis（DM）and polymyositis（PM）. Methods：The properties of MRI were analyzed retrospectively in 16 patients with PM and 8 of DM.MRI of bilateral thighs were performed in all patients with fast spin echo T1-weighted,T2-weighted and fs T2-weighted sequences as well as plane scans by coronal,sagittal and transverse views.Results：Abnormal MRI was found in 19 of the 24 patients of PM/DM.The findings included muscular edema in 16 patients,inflammation in fascia in 10,edema in the subcutaneous tissue in 6 and muscle atrophy in 2.Conclusion：MRI can be competent in diagnosis of polymyositis and dermatomyositis,which common-ly demonstrates edema in muscle and subcutaneous tissue on the images.Particularly,the detection on fs T2WI can favorably reveal inflammatory lesions in soft tissues.