恶性组织细胞病(简称恶组)是一种单核-巨噬细胞系统的恶性增生性疾病。多见于成人,儿童较少见。临床表现依受累器官或组织不同而复杂多样,缺乏特异性,故临床极易误诊。据吴风祥等[1]统计该病误诊率高达82%。现将我科收治的一例误诊病例报告如下。1　临床资料患儿男,9岁。因发热 Malignant histiocytosis (referred to as the evil group) is a malignant proliferative disease of the monocyte-macrophage system. More common in adults, children are rare. Clinical manifestations vary depending on the organ or tissue implicated and diverse, the lack of specificity, it is extremely easy to misdiagnosis of the clinical. According to Wu Fengxiang [1] Statistics misdiagnosis rate of the disease up to 82%. Now we receive a case of misdiagnosed cases are as follows. 1 clinical data children male, 9 years old. Because of fever