Results 11 tumors were at the upper ureter and 4 the lower. They demonstrated the common patterns as middling signal masses,filling defects and dilatation of the urinary tract above the obstruction.

• 结果输尿管中上段癌 11例 ,下段癌 4例 ,MRU共同征象 :梗阻端输尿管腔内有中等信号的肿块 ,呈结节状或分叶状 ,表现为充盈缺损征象 ,梗阻以上尿路扩张。