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磁共振成像(MRI)可显示炎症性肌病,且其单纯明暗度与临床疾病活动程度相关,故可用于确定肌病的活动性,指导肌活检部位以及估价治疗反应等,皮肌炎的肌活检是确定诊断的主要依据,但其肌肉的受累并不是一致的,炎症呈斑块状分布,因此,肌活检的阳性率仅约78％。本文报导1例非典型患者,经用MRI指导肌活检才得到确诊。
Magnetic resonance imaging (MRI) can show inflammatory myopathy, and its pure brightness and clinical disease activity level, it can be used to determine the activity of myopathy, and guide the site of the biopsy and evaluate the therapeutic response, etc., dermatomyositis Biopsy is the main basis for the diagnosis, but its muscle involvement is not consistent, the plaque-like distribution of inflammation, therefore, the positive rate of muscle biopsy is only about 78%. This article reports a case of atypical patients, MRI-guided muscle biopsy was diagnosed.