胚胎性横纹肌肉瘤是最常见的发生在儿童及年轻人的软组织肉瘤,最好发于头颈部、泌尿生殖道、四肢软组织,而原发于骨组织者非常少见,现将我院2例分别原发于股骨及肱骨的胚胎性横纹肌肉瘤患者临床症状、影像学特点、病理组织形态特征以及免疫组织化学结果报道如下。资料与方法1.一般资料1例女性患者,25岁,左大腿酸痛伴不适2个月余,近期疼痛加剧、不能缓解,行走困难;股骨正侧位X射线摄片及CT、MRI等影像学 Embryonic rhabdomyosarcoma is the most common in children and young people with soft tissue sarcoma, preferably in head and neck, genitourinary tract, extremity soft tissue, and primary in bone tissue are very rare, now in our hospital were 2 cases The clinical symptoms, imaging features, histopathological features and immunohistochemistry results of embryonic rhabdomyosarcoma originating from the femur and humerus are reported as follows. Materials and Methods 1. General Information 1 female patient, 25 years old, left thigh pain and discomfort more than 2 months, the recent pain intensified, can not be alleviated, walking difficulties; posterior lateral femur X-ray and CT, MRI and other imaging