患儿女，12岁。因腹部包块来诊。自述腹部包块一年多，逐日增大，近来时有腹痛。体检：心肺正常，肝脾未触及，血常规及尿常规正常，T36．SC”，血沉120mm／h。下腹部膨隆，可触及一巨大肿物，质地较硬，活动度欠佳，表面不光滑。B型超声检查：子宫向后移位，境界尚清晰，宫内 The child is 12 years old. Abdominal mass for diagnosis. Self-reported abdominal masses have been growing for more than a year and have increased daily, with abdominal pain in recent times. Physical examination: normal heart and lung, liver and spleen not touched, normal blood and urine routine, T36. SC", Erythrocyte sedimentation rate 120mm/h. Lower abdomen bulging, palpable a huge mass, hard texture, poor mobility, surface is not smooth. B-mode ultrasound examination: the uterus shifts back, the realm is still clear, intrauterine