Conclusion ultrasonic approach is the first choice for diagnosis low segment ureteral polyp , and it is more valuable in patients complicated with x - ray negative stone , difficult for retrograde urethrography and allergy to iodine 结论超声是输尿管下段息肉的首选筛查方法,对合并阴性结石、逆行造影困难、碘过敏者更具有价值。