刘某,男,26岁,工人。因右臀部疼痛性肿块3月,右下腹肿块2月,疼痛加剧入院。既往无创伤、肿瘤史。查体:体温38.5℃,脉搏106次/分,血压19.3/9.3kPa(100/70mm Hg)。慢性病容。右下肢被动于屈腰屈髋位,右臀部弥漫性肿大,境界不清,中硬触痛,右下腹有15×15×10cm同质肿块,与臀部肿块无界限,似由前者延伸而来。全身未再发现肿块。X线片:右髂骨翼约15×10cm大 Liu, male, 26 years old, worker. Due to a painful mass in the right buttocks in 3 months and a mass in the right lower quadrant in 2 months, the pain increased to hospital. Past no traumatic, tumor history. Physical examination: body temperature 38.5°C, pulse 106 beats/min, and blood pressure 19.3/9.3 kPa (100/70 mm Hg). Chronic disease. Right lower extremity passively flexed to flexion hip position, diffusely swollen right hip, unclear realm, moderate tenderness, 15×15×10cm homogeneous mass in the right lower quadrant, no boundary with buttocks mass, like extending from the former . No more lumps were found throughout the body. X-ray: The right sacrum is approximately 15 × 10cm