皮肌炎肺部病变的影像学分析

Analysis of Radiographic Changes in Pulmonary Involvement due to Dermatomyositis

目的 探讨皮肌炎并发肺部病变的影像学特征。方法 收集本院近两年来收治的 2 8例皮肌炎患者的临床及影像学资料 ,分析其肺部表现、胸部 X线和高分辨 CT(HRCT)的特点。结果 2 8例皮肌炎患者中有明显呼吸道症状的 9例 ,有肺部体征 6例 ;胸部 X线诊断肺部改变 9例 ,阳性率为 32 .2 % ;胸部 HRCT诊断 2 3例 ,阳性率为 82 .2 % ;病程小于或等于 1年的患者阳性率 77.8% (14 /18) ,病程大于 1年的患者阳性率 90 % (9/10 )。结论 胸部 X线、HRCT是诊断皮肌炎伴发肺部病变的有效方法 ;HRCT较胸部 X线的敏感性高 ;随皮肌炎病程进展 。

Objective To study the image characteristics of pulmonary involvement attributed to dermatomyositis.Methods 28 cases of dermatomyositis were collected and the measures of pulmonary manifestations, chest X ray plain film, high resolution computed tomograpy (HRCT) were performed and studied. Results Nine cases had syndromes and 6 cases had abnormal signs. The sensitivity of pulmonary involvement by chest plain film and HRCT were 32.2%, 82.2%, respectively. HRCT had positive findings in 77.8% of the total patients who had clinical course less than 1 year, and 90% of the patients with clinical course more than 1 year.Conclusion Chest X ray plain film and HRCT are effective methods in detecting pulmonary involvement attributed to dermatomyositis. HRCT is more sensitive than X ray plain film. The incidence rate of pulmonary involvement due to dermatomyositis increases overtime.