目的探讨脐尿管癌的CT表现及 螺旋CT在脐尿管癌诊断中的价值。方法 回顾性分析我院9例经手术及病理证实的 脐尿管癌的CT及MPR重建图的表现，包括 肿瘤的部位、边界、形态、生长方向、密 度、强化及转移情况，并分析总结。结 果 9例脐尿管癌在CT上均表现为位于脐尿 管走行区(即Retzius间隙内)中线或偏离 中线的膀胱顶前壁的肿块；9例均为囊实 性，6例肿瘤内见钙化；脐尿管癌有沿脐 尿管蔓延的趋势，其中约一半侵犯膀胱右 前上壁并向右前上方生长；肿瘤可在膀胱 壁上形成并发生远隔转移；结论 脐尿管 癌有特征性的发生部位和影像学特点，螺 旋CT及MPR重建对其术前准确的诊断具有 重要的参考价值。

Objective To discuss findings of urachal carcinoma by spiral CT, and discuss the value of spiral CT in the diagnosis of urachal carcinoma. Methods The CT findings and MPR features of nine cases with diagnosed by pathological examination in our hospital were included in this study. Surgically proven urachal carcinomas were retrospectively reviewed, and theCT images were evaluated to determine tumor localization, boundary, morphology, growth trend, density, enhanced pattern, and metastases were analyzed. Results CT in all nine cases showed a mass located in the midline or slightly off center line between the dome of the bladder and the umbilicus. nine cases were mixed cystic solid lesions. Calcifications were present in six cases. Urachal carcinoma grow along with the urachus，about half of them invasion of right anterior superior wall of bladder and grow right up front. The tumor can form a distant metastasis on the bladder wall. Conclusion spiral CT examinations and MPR reconstruction before surgery has important reference value to correctly diagnose of urachal carcinoma which showed unique location and characteristic imaging findings.