例1:女:3岁,因发现腹部包块就诊。查体:一般情况好,腹部微隆,左上腹扪及一个6.0cm3肿块,质韧、表面较光滑,活动度可,微压痛。CT示左上腹有一个5.8cm×4.3cm类圆形软组织密度影,界清,前壁可见少量钙化,内密度欠均匀,中心呈低密度,轻度不均匀增强表现。全麻下肿瘤切除术,腹膜后有 Example 1: Female: 3 years old, because of the discovery of abdominal mass treatment. Physical examination: the general situation is good, the abdomen slightly long, the left upper abdomen palpable with a 6.0cm3 mass, tough quality, the surface is relatively smooth, activity, micro tenderness. CT showed a 5.8cm × 4.3cm class on the left upper quadrant soft tissue density, clear boundary, the front wall shows a small amount of calcification, the density is less uniform, the center was low density, mild uneven enhancement. Tumor resection under general anesthesia, retroperitoneal