以骨关节、肌肉等风湿症状为首发表现的恶性组织细胞瘤(MM)报道不多,如缺乏警惕,很易误诊、漏诊。现将我们收治的3例分析如下。1病历摘要例1:男,24岁。不规则发热半个月,右膝、踝关节游走性疼痛,间歇性跛行10 d。曾于院外按风湿热、风湿性关节炎治疗后加重伴全身乏力入院。查体 To bone and joint, muscle and other rheumatoid symptoms as the first manifestation of malignant histiocytoma (MM) reported few, such as lack of vigilance, it is easy to misdiagnosis, missed diagnosis. Now we receive the 3 cases analyzed as follows. 1 Medical Summary Example 1: Male, 24 years old. Irregular fever for half a month, right knee, ankle wandering pain, intermittent claudication 10 d. In the hospital by rheumatic fever, rheumatoid arthritis after treatment with aggravated generalized hospitalization. Physical examination