前列腺肉瘤的CT及MRI表现(附4例报告及文献复习)  

CT and MRI Manifestations of Prostate Sarcoma:A Report of 4 Cases and Review of the Literature

作　　者：王微微[1] 陈燕[1] 郭晨光[1] 王渊[1] 张明[1] 

机构地区：[1]西安交通大学医学院第一附属医院影像中心,陕西西安710061

出　　处：《实用放射学杂志》2007年第12期1659-1661,共3页Journal of Practical Radiology

摘　　要：目的探讨前列腺肉瘤的CT和MRI表现特点及鉴别诊断。方法回顾性分析4例经病理证实的前列腺肉瘤的CT、MRI表现,并作文献回顾。结果本组4例均行CT平扫,1例行CT增强扫描。平扫显示前列腺体积明显增大,平均前后径为60.5mm。其中3例肿瘤呈分叶状不均质性低密度,中心部呈更低密度,并与周围结构分界不清;1例呈类圆形较均质性稍低密度,与周围结构分界尚清楚。增强扫描,肿瘤边缘实质部分呈不均质明显强化,中心区未见明显强化。2例行MRI扫描,T1WI呈不均质性低信号,T2WI均呈中心高信号、外周稍高信号的混杂信号影。结论CT及MRI是诊断前列腺肉瘤较有效的检查方法。Objective To explore the CT and MR imaging features and differential diagnosis of the prostate sarcoma. Methods CT and MRI findings of prostate sarcoma in 4 patients confirmed by pathology were retrospectively analyzed with literature review. Results All cases underwent plain CT scan and one case underwent contrast - enhanced CT scan, MR imaging was performed in 2 cases. The prostates were increased obviously in volume,the average anterior - posterior diameter was 60.5 mm in all cases, lobulated heterogeneous low - density with lowest - density in the center and the tumors were undefinitive with surrouding structures in 3 cases,1 case showed oval homogeneous low - density with sharp margin on plain CT scan. On contrast - enhanced CT, the lesions appeared as heterogeneous enhancement in periphery of prostates and no enhanced at the centre. MRI showed heterogeneous hypo - signal intensity on T1WI and miscellaneous slight high - signal intensity at center and hyper - signal intensity at periphery on T2WI. Conclusion CT and MRI are the effective methods in diagnosing the prostatic sarcoma.

关 键 词：前列腺 肉瘤 体层摄影术 X线计算机 磁共振成像 

分 类 号：R737.25[医药卫生—肿瘤] R814.42[医药卫生—临床医学]