患儿,女性,4岁,因反复发热半年入院。半年前患儿无明显诱因出现发热伴尿频、尿急、尿痛,于外院诊断为尿路感染、大肠杆菌败血症,经抗炎对症治疗后,体温下降。出院后体温反复波动而入院。入院查体:体温37.8℃,心肺未见异常,右下腹可扪及一轮廓钝圆的包块,约11 cm×8 cm大小,轻压 Children, women, 4 years old, admitted to hospital for six months because of repeated fever. Six months ago no obvious incentive for fever in children with frequent urination, urgency, dysuria, urinary tract infection in the outer hospital, E. coli sepsis, anti-inflammatory symptomatic treatment, the body temperature dropped. After discharge, the body temperature fluctuated and admitted to the hospital. Admission examination: body temperature 37.8 ℃, no abnormal heart and lung, palpable right lower quadrant and a blunt round mass, about 11 cm × 8 cm size, soft