患者，女，发现骶尾部肿物2天。查体：骶尾部有一带蒂肿物，呈球形，大小7cmX5cmX5cm，蒂部直径3cm，表面皮肤无改变，质地软。临床诊断先天性血管瘤，遂行肿瘤切除术。术中见肿瘤最深处位于皮下层，与周围组织界限清，与谁管不相通。病理检查：球形肿物1个，大小6．5cmX6cmX4 The patient, female, found an appendix mass for 2 days. Physical examination: There is a pedunculated mass in the sacrococcygeal end, which is spherical, 7cmX5cmX5cm in size, 3cm in diameter at the pedicle, no change in surface skin and soft texture. Clinical diagnosis of congenital hemangioma, neoplastic resection. In the surgery, the deepest part of the tumor was located in the subcutaneous layer, and the boundary between the tissue and the surrounding tissue was clear, and it was not connected to anybody. Pathological examination: 1 spherical tumor, size 6.5cmX6cmX4