患者男 ,5 9岁 ,一年来间歇性下腹部隐痛 ,发作 4～ 5次 ,下腹部阵发性绞痛伴腹胀 4天 ,且逐渐加重。无恶心、呕吐 ,每日排便一次 ,无血便或黏液便。查体 :下腹部可触及约 12ｃｍ× 12ｃｍ肿物 ,有压痛、上界清晰 ,活动性差。疑急性尿潴留或下腹部肿物。超声检查发现膀胱内有少 The patient was male, 5-9 years old. He had intermittent lower abdominal pain for 4 years and he had 4 to 5 episodes. Paroxysmal colic in the lower abdomen was accompanied by abdominal distension for 4 days and he was gradually worsening. No nausea, vomiting, defecation once a day, no blood or mucus will be. Examination: The lower abdomen can touch about 12cm x 12cm tumor, tenderness, clear upper bound, poor activity. Suspected acute urinary retention or lower abdominal mass. Ultrasonography reveals that there is less in the bladder