1　病历简介女 ,34岁。以右髋活动受限 2年 ,右臀部肿物 2个月为主诉收入院。入院前 2年无明确诱因出现右髋关节活动受限 ,无疼痛感 ,未予诊治。入院前 2个月发现右臀部肿物 ,伴右下肢酸痛感 ,弯腰时加重。查体 :右臀部深部触及一 3cm× 3cm肿物 ,界清 ,质硬 ,无活动度 ,局部无 1 medical records Female, 34 years old. Restricted to the right hip activity for 2 years, right hip mass 2 months mainly admitted to hospital. 2 years before admission without a clear incentive to appear limited right hip movement, no pain, no diagnosis and treatment. 2 months before admission found that the right hip mass, with a sense of right lower limb pain, increased bending over. Physical examination: the right hips deep touch a 3cm × 3cm tumor, clear, hard, no activity, no local