患儿女，7岁，以下腹肿物待查入院。查体：一般情况好，在中下腹可触及16cm×16cm大小的肿物，有明显的囊性感，可上下活动，无疼痛及压痛，无肠形及蠕动波。超声检查所见：子宫大小形态正常。在右侧卵巢区可见17．7cm×9．8cm×7.8cm的液性回声区、边界清晰，其内可见少量的强 Children with children, 7 years old, the following abdominal mass to be admitted to hospital. Physical examination: the general situation is good, palpable in the lower abdomen 16cm × 16cm size of the tumor, a clear cystic sexy, up and down activities, no pain and tenderness, no intestinal and peristaltic waves. Ultrasound findings: normal uterine size and shape. In the right ovary area can be seen 17.7cm × 9.8cm × 7.8cm liquid echo area, the boundary is clear, which can be seen a small amount of strong