患者２６岁，未婚。因右下腹肿物１０年余，于１９９９年１月４日入院。追问病史，１０年前自觉下腹部膨胀，并逐渐增大，无疼痛，月经规律，经量中等。体检：发育正常，心肺肝脾未见异常。腹部膨隆，扪及足球大小包块，表面光滑、质硬，边界清楚，活动可，无压痛，腹水征（－ Patient 26 years old, unmarried. Due to right lower quadrant tumor more than 10 years, in January 4, 1999 admission. Question history, 10 years ago consciously lower abdominal expansion, and gradually increased, no pain, menstrual regularity, by the amount of medium. Physical examination: normal development, no abnormal heart and lung liver and spleen. Abdominal bulge, palpable football size mass, smooth, hard, clear boundary, activity can be, no tenderness, ascites sign (-