患者　女,右侧腰痛3个月。1年前右输尿管结石行体外碎石术治愈。查体:右侧腹部轻度压痛,未扪及肿块,右侧肾区叩击痛。腹部Ｘ线平片未见异常。ＣＴ扫描见右肾重度积水,肾皮、髓质萎缩变薄(图1),近段输尿管扩张,至腰4椎体水平扩张的输尿管截断,形成一约2.0ｃｍ×1.6ｃｍ×0.8ｃｍ Female patient, right back pain 3 months. A year ago, the right ureteral calculi in vitro lithotripsy cured. Physical examination: the right abdomen mild tenderness, palpable mass, the right kidney percussion pain. Abdominal X-ray showed no abnormalities. CT scan, see the right kidney, severe hydronephrosis, renal atrophy, medullary atrophy thinning (Figure 1), proximal ureteral dilatation, the level of the lumbar vertebral 4 dilatation of the ureter cut off to form a 2.0cm × 1.6cm × 0.8cm