患者女,51岁。2015年12月28日入院,于入院前4个月无意中发现左侧臀部有一鸡蛋大小肿物,近1个月肿物呈进行性增大,大小约8cm×5cm,肿块质韧,无波动感,与周围组织界限明显,无压痛,皮肤表面无溃烂。超声检查:左臀部近坐骨结节处可见大小不等的低回声肿物,大者约2.22cm×1.62cm,部分结节融合,边界清,形态规则,部分肿物内可见无回声区,肿物周边及内部可探及动脉样血流信号,RI Female patient, 51 years old. December 28, 2015 admitted to hospital 4 months before inadvertently found the left buttocks have an egg-sized tumor, nearly 1 month was progressively increased tumor size of about 8cm × 5cm, lump tough, no wave Dynamic, clear boundaries with the surrounding tissue, no tenderness, the skin surface without ulceration. Ultrasonography: the left hips near the ischial tuberosity at different sizes of hypoechoic mass, the largest about 2.22cm × 1.62cm, part of the nodule fusion, clear boundary, the rules of morphology, some of the tumor can be seen in the anechoic area, swollen Objects can be detected around the internal and arterial blood flow signal, RI