Cleveland R H, Kushner D C, Herman T E, Kim S H
Pediatr Radiol. 1986;16(1):76-8. doi: 10.1007/BF02387516.
Ureteropelvic junction (UPJ) obstruction is generally considered to be a congenital lesion or occasionally an intermittent phenomena relating to periods of increased urine flow. Acquired ureteropelvic junction obstruction without a recognizable secondary cause is quite unusual. We present a 5.5-year-old boy who, 4 years after repair of a right sided UPJ obstruction, developed a significant left-sided UPJ obstruction in a system which previously had been normal.
肾盂输尿管连接处（UPJ）梗阻通常被认为是一种先天性病变，偶尔也会是与尿量增加期相关的间歇性现象。无明显继发原因的后天性肾盂输尿管连接处梗阻相当罕见。我们报告一名5.5岁男孩，其右侧UPJ梗阻修复术后4年，在一个之前正常的系统中出现了严重的左侧UPJ梗阻。
