例1.男性,14岁。入院前两年感左腰部胀痛,无高热及尿路症状,一个月后左腰部皮肤红肿,经多种抗生素治疗无效而破溃,并有较稀薄的脓液排出。曾两次在外院行扩创手术未愈,经瘘管造影证实为肾盂皮肤瘘后收住院。查体见左下腰三角处有一瘘口,腰部挤压时有较稀薄的脓汁流出。尿液微混,蛋白微量,镜检红细胞偶见,脓球4～6 Example 1. Male, 14 years old. Two years before admission, left lower back pain, no fever and urinary tract symptoms, a month after the left lumbar skin redness, ineffective and ulcerated by a variety of antibiotics, and thinner pus discharge. Had twice outside the hospital expansion surgery was cured, confirmed by fistuloscopy after the renal pelvis skin fistula admitted to hospital. See the left lower lobe at the triangle at a fistula, waist squeeze thinner pus outflow. Micro-mixed urine, protein trace, microscopic examination of red blood cells occasionally, pus ball 4 ~ 6