脐尿管癌的CT诊断

CT Diagnosis of Urachal Carcinoma

目的:探讨脐尿管癌的螺旋CT表现特点,提高对本病的认识。方法:回顾性分析7例经手术病理证实的脐尿管癌的螺旋CT表现,包括肿块的部位、形态、大小及增强表现。结果:7例病理均为腺癌或黏液腺癌。CT均表现为脐尿管与膀胱交界区大小不等的软组织肿块,5例肿块同时向腔内外生长,1例腔内生长为主,1例肿块主要位于腔外。肿块形态不规则,6例伴有周围膀胱壁受侵增厚。1例肿块内见多个斑点状钙化。增强扫描5例呈不均匀强化,2例强化均匀,7例静脉期均明显强化。结论:脐尿管肿瘤有其独特的发生部位,影像表现典型,术前CT检查能够做出准确定位与定性诊断。

Objective：To investigate and improve the understanding of spiral CT characteristics of urachal carcinoma. Methods：The CT findings of 7 cases with pathology confirmed urachal carcinoma were reviewed retrospectively,including the location, shape, size and the enhanced pattern of the tumor mass after contrast administration. Results： Of these 7 cases, the pathology diagnosis was urachal adenocarcinoma or mucinous carcinomas. On CT scans, the tumor masses varied in size, located at the junction of urinary bladder and urachus,appeared as homogeneous soft tissue density and irregular in shape. The growth pattern of tumors were intra-extra-cavitary （5 cases）, intra-cavitary and extra-cavitary for one case each. The adjacent urinary bladder wall was thickened in 6 cases and some punctuate calcifications were seen within the tumor in 1 case. Five lesions showed heterogeneous enhancement and 2 lesions showed homogenous enhancement after contrast administration,all showed marked enhancement mainly on the portal venous phase. Conelusion：Urachal carcinoma showed unique location as well as characteristic CT manifestations. Accurate diagnosis and localization could be obtained by CT examination before surgery.