患儿女 ,2 4天 ,因“左侧腰部包块 2 4天 ,增大呈青紫色伴面色苍白 3天”入院。患儿为第二胎第二产 ,足月顺产 ,出生体重不详。出生后即发现左侧腰部皮下有一肿块 ,范围约 3× 5cm2 ,外表呈正常肤色 ,质软 ,无压痛 ,无波动感 ,生后未见明显变化 ,未经诊治。入院前 3天 ,无明显 Children with children, 24 days, due to “the left lumbar mass 2 4 days, increased pale blue with pale 3 days” admission. The second child with a second child, full-term birth, birth weight unknown. After birth, it was found on the left lumbar subcutaneous there is a lump, the size of about 3 × 5cm2, the appearance of a normal color, soft, no tenderness, no fluctuations, no significant changes after birth, without diagnosis and treatment. 3 days before admission, no obvious