Purpose : To evaluate CT features of metastatic ureteral tumors. Materials and Methods : CT findings in 16patients with ureteral metastases were evaluated retrospectively ; there were eight cases of bilateral ureteralinvolvement. Primary tumors metastatic to the ureter were advanced gastric cancer (n=13), breast cancer (n=1),colon cancer (n=1), or adenocarcinoma of unknown primary (n=1). We analysed CT findings with regard to the site ofureteral obstruction, configuration of obstructed sites of ureter, presence or absence of periureteral soft tissuedensity, and status in other organs. Results : Among 24 ureters involved, ureteral wall thickening was noted in15, periureteral soft tissue density in 13. Small nodular enhancing lesions less than 1 cm, within theretroperitoneal space around the involved ureters were noted in seven patients, and four of them were multiplelesions. Conclusion : Among various primary tumors, gastric cancer was the most common cause of ureteralmetastasis. The commom CT findings of ureteral metastases were thickening of ureteral wall, periureteral softtissue density, and small periureteral enhancing nodular lesions. The constellation of these CT findings may behelpful in making the diagnosis of ureteral metastases.