乳头状肾细胞癌的CT和MRI特征  

CT and MRI features of papillary renal cell carcinoma

作　　者：刘建平[1] 程雪[1] 周利民[1] 卢陈英[1] 

机构地区：[1]丽水市中心医院放射科,浙江丽水323000

出　　处：《实用放射学杂志》2012年第4期576-579,共4页Journal of Practical Radiology

摘　　要：目的 分析乳头状肾细胞癌（papillary renal cell carcinoma,PRCC）的CT和MRI表现特征,以提高诊断水平.方法 回顾性分析经手术病理证实的17例PRCC的临床资料及CT和MRI检查结果,并与手术病理对照.结果 12例PRCC CT平扫肿瘤为均匀的等密度或不均匀的囊实性病灶,增强扫描皮髓期肿瘤实性部分呈轻度均匀强化;实质期强化程度高于皮髓期,病灶边界显示最清楚;分泌期病灶密度等于或稍低于实质期,7例PRCC MRI平扫T1WI呈等或稍低信号,T2WI呈欠均匀低信号,增强扫描皮髓期及实质期轻度不均匀强化,肿瘤边界清楚,有完整假包膜.结论 PRCC与CRCC在CT、MRI上有不同的表现,具有一定的特征性,有利于提高其诊断的准确性,对PRCC的术前诊断具有重要作用.Objeetive To study the CT and MRI features of papillary renal cell carcinoma （PRCC） in order to improve the diagnosis of this tumor. Methods The clinical materials and image findings of 17 cases with PRCC proved by pathology were retrospectively studied. Results The tumors in 12 patients showed homogeneous isointensity or inhomogeneous cystic solid density at unenhanced CT scan. The solid partsof tumors showed light enhancement at thecortieomedullary phase and keep on enhancement at thenephro graphic phase and were higher than corticomedullary phase, the edges of the tumor were clear. The tumors were iso or hypo density in the secretory phase compared to nephrographic phase. Seven tumors showed isoor hypo-intense on T2 WI and hypo intense on T2 WI, and showed mild enhancement at corticomedullary phase and nephrographic phase. The margins of masses were shown mosl clearly and the pseudocapsule could been seen at the nephrographic phase. Conclusion CT and MRI findings of PRCC have some charameristics which are of important value in diagnosis of PRCC preoperatively.

关 键 词：肾 肾细胞癌 体层摄影术 X线计算机 磁共振成像 

分 类 号：R737.11[医药卫生—肿瘤] R814.42[医药卫生—临床医学]