患者,男,75岁。腹胀5天入院。查体,中下腹明显膨隆,触及中下腹分叶状囊性包块,约20cm×20cm,无明显压痛,静脉肾盂造影示双肾盂肾盏正常。左输尿管下段扩张,膀胱充盈欠佳,左下腹一巨大高密度块状影,钡灌肠示肠管受压移位。B超示腹部多房性囊性包块。CT所见:膀胱形态不规则,伴多个大小不等的囊状影突出膀胱及囊腔内均见造影剂(图1),其中最大两个位于两侧(分别为16.5cm×12cm×11cm、9.0cm×8, Patient, male, 75 years old. Bloating 5 days admitted. Physical examination, the lower abdomen significantly bulging, touching the lower abdomen lobulated cystic mass, about 20cm × 20cm, no significant tenderness, intravenous pyelography showed double renal calyx normal. Lower left ureteral dilatation, poor filling of the bladder, a large high-density block shadow of the left lower quadrant, barium enema shows the bowel pressure shift. B ultrasound showed abdominal multilocular cystic mass. CT seen: irregular bladder shape, with multiple sizes of cystic shadow protruding cysts and cysts are seen contrast agent (Figure 1), the largest two on both sides (respectively 16.5cm × 12cm × 11cm , 9.0 cm × 8,