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[Spontaneous rupture of the ureter caused by metastatic ureteric tumor: a case report].

A 66-year-old man was admitted to our hospital with left flank pain. Drip infusion pyelography (DIP) and abdominal computed tomography (CT) showed urinary extravasation. Magnetic resonance imaging (MRI) and retrograde pyelography (RP) demonstrated stenosis of the ureter. Left nephroureterectomy was performed. Histopathological examination showed poorly differentiated adenocarcinoma, located in the ureteral wall with intact mucosa and adventitia. After the operation, sigmiod colon carcinoma was pointed out by colon fiberscope, and sigmoidectomy was performed.