组织细胞增生症,又名网状内皮细胞病,组织细胞增多病Ⅹ,很为少见。其病因不详,具有炎症与肿瘤的双重性,极易误诊。下面报告我科及小儿科共收治的二例。资料病例1,女,2.5岁,住院号8135。患儿因右髋部不适,轻度跛行三个月,于1981年3月26日入院。过去史:七月前有外伤史。无发热,消瘦,食欲减退, Histocytosis, also known as reticuloendothelial disease, histiocytosis Ⅹ, very rare. The etiology is unknown, with the dual nature of inflammation and cancer, easily misdiagnosed. The following report our department and pediatrics were treated in two cases. Data Case 1, female, 2.5 years old, hospital number 8135. Children with right hip discomfort, mild lameness for three months, on March 26, 1981 admitted to hospital. Past history: a history of trauma before July. No fever, weight loss, loss of appetite,