混合性结缔组织病(MCTD)是一种特殊的风湿病综合征。1972年Sharp等发现临床上系统性红斑狼疮、硬皮病、多发性肌炎三个疾病同时出现的患者,血清学检查ENA致敏的RNP的抗体效价增高时称混合性结缔组织病。由于其临床X线表现及演变常复杂曲折,多数征象又无特异性,诊断常有困难,我们力求从X线角度找到诊断之可能性。现将搜集的40例MCTD分析如下。 Mixed connective tissue disease (MCTD) is a special rheumatic disease syndrome. In 1972, Sharp et al found that patients with clinically systemic lupus erythematosus, scleroderma, and polymyositis also had mixed serological tests. ENA-sensitized RNP titer antibody titer was mixed with connective tissue disease. Due to the complicated and tortuous clinical manifestations and evolution of X-ray, most of the signs are nonspecific and the diagnosis is often difficult. We try to find the possibility of diagnosis from X-ray. The 40 cases of MCTD collected now are analyzed as follows.