患儿：女，612岁。以右腰部肿痛五天，伴高烧为主诉入院。入院前七天患儿无明显诱因突发腹痛，阵发性加重，以脐周为主，伴发烧，呕吐，体温39C以上，寒战，无抽搐、腹泻、黄恒。院外治疗无效，两天后右腰部出现明显肿胀、疼痛，伴腹胀、间歇性腹涌，食少，大小便量少。体检： Children: female, 612 years old. To the right waist and swelling pain for five days, with high fever mainly sued. Seven days before admission, children with no obvious incentive for sudden abdominal pain, paroxysmal aggravate, mainly in the umbilical weeks, with fever, vomiting, body temperature 39C above, chills, no convulsions, diarrhea, Huang Heng. Out-of-hospital treatment was ineffective, with obvious swelling and pain in the right lumbar area after two days, with abdominal distension, intermittent abdominal surge, lack of food, and small amount of urine. Physical examination: