患者女,37岁,一年前在外单位作健康体检发现右肾囊肿,无明显不适。近2月来因劳累后出现右侧腰腹部胀痛而入院。超声检查:右肾轮廓明显增大,表面突隆不平,中上极偏外侧显示约9ｃｍ×7ｃｍ×6ｃｍ囊性肿块,壁欠光滑,内有较多絮状回声,其内侧壁显示直径约15ｃｍ×15ｃｍ乳头状突起 Female, 37 years old, a year ago for a health examination outside the unit found that right renal cysts, no obvious discomfort. Nearly two months because of fatigue after the right side of the waist and abdominal pain and admission. Ultrasound examination: the outline of the right kidney increased significantly, the surface of the sudden protuberance uneven, the top of the pole in the lateral display of about 9cm × 7cm × 6cm cystic mass, the wall less smooth, with more flocculent echo, the inner wall shows a diameter of about 15cm × 15cm papillae