例1,女4岁.发现上腹部肿物半年就诊.查体:左上腹可触及约10cm大肿物,界清,无明显压痛.B超检查:左上腹部探及一囊性包块,大小为102mm×44mm×102mm,单房,壁薄,有包膜,液性略区内见细小光点且深部较密,近后壁见一高回声光团,大小为20mm×9mm,后方无声影,不随体位改变移动,后壁回声增强.B超提示:左上腹囊性占 Case 1, female, 4 years old. He found upper abdominal mass for six months. Physical examination: left upper quadrant can touch about 10cm large mass, clear boundary, no obvious tenderness. B-ultrasonic examination: left upper abdomen and a cystic mass, size It is 102mm x 44mm x 102mm. It has a single room with a thin wall and a covered film. The liquid spot area is seen with a small spot and the deep part is dense. In the near posterior wall, a high echo light group with a size of 20mm x 9mm is heard. Shadow, does not change with body position movement, posterior wall echo enhancement. B ultrasound tips: left upper quadrant cystic