腹膜后孤立性纤维性肿瘤的MSCT表现  

MSCT findings of retroperitoneal solitary fibrous tumor

作　　者：田彤彤[1] 胡晓华[1] 朱庆强[1] 杨国美[1] 吴晶涛[1] 

机构地区：[1]扬州大学临床医学院江苏省苏北人民医院医学影像科,江苏扬州225001

出　　处：《实用放射学杂志》2013年第12期1971-1975,共5页Journal of Practical Radiology

摘　　要：目的探讨腹膜后孤立性纤维性肿瘤（SFT）的CT表现。方法回顾性分析经手术病理证实的6例腹膜后SFT的CT、表现。6例均行L、T增强扫描,4例行CT平扫。观察瘤体的部位、大小、形念、包膜、CT密度及强化等特点,将影像表现与病理结果对照分析。结果（1）6例SFT中，左侧腹膜后2例，右侧腹膜后4例，6例均为良性，其中单发5例。多发1例，共8个病灶。肿嚼直径3．2～16．9cm，平均9．6cm。8个肿瘤病灶中呈类圆形或椭圆形6个，形念不规则2个。边界清楚荇7个,边界小清或部分不清者1个。（2）CT平扫密度小均匀或相对均匀,3例肿瘤内均可见低密度灶,1例见高密度出血灶。（3）CT、增强：6例共7个病灶的动脉期呈“地图样”不均匀强化．并可见多发迂曲供血血管从肿瘤的边缘延伸到肿瘤内部，静脉期旱现进行性或持续性强化,最明显处可见“血管状”强化．延迟期强化部分趋于均匀。肿瘤内可见不规则片状、结节状无强化区,1例病灶动脉期及静脉剐氅轻中度不均匀喊化。（1）病理表现：瘤细胞呈梭形或卵圆形,细胞间可见胶原纤维及薄壁的“鹿角状”分支血管。结论影像学上见单发或多发、边界清楚的软组织肿块,密度不均匀，增强动脉期不均匀蚀化，静脉期、延迟期呈持续性强化,肿瘤内见迂曲供血血管，应考虑SFT的可能。Objective To investigate the CT findings of retroperitoneal solitary fihrous tumor（SFT）. Methods The CT findings of 6 cases with pathologically proved retroperitoneal SFT were retrospectively analyzed. All the patients were performed enhanced CT scan and 4 of them were performed plainCT scan. The location, size, shape, capule, density and enhancement characteristics of tumors were analyzed and comparatively with pathological results. Results （1）SFT were located in the left retroperiloneum （2/6）, and right retroperitoneum （4/6）. There were 8 lesions, including 5 single tumors and one multiple tumors. All of them were hen gin. The average tumor size was 9.6 cm （3.2 to 16.9 cm）. Among them 6 tumors were round or ellipse, and2 tumors were irregular. Seven tumors had well-defined contours, and one showed ill defined contours. （2）On CT scan, all tumors showed inhomoge neous density or relatively homogeneous density. Three of them showed low density areas. Hemorrhagic loci were detected in 1 case. （3）On enhanced CT scan, 7 tumors showed irregular enhancement with muhiplecircuitous feeding vessels extending to the center of the tumors in the arterial phase, and continuous or progressive enhancement with vascular enhanced areas in the venous phase. During the delayed phase, the enhanced areas presented with homogeneous enhancement. There were patches or irregular non enhanced areas during the enhanced phases. One tumor showed mild-to moderate inhomogeneous enhancement in the arterial and venous phase. （4）Histopathologicai results： the tumors were composed of spindle or oval cells with collagen fibers and thin walled staghorn branching vessels. Conclusion The possibility of SFT should he considered when a single or multiple soft tissue masses with sharp border, inhomogeneous density, especially presented inhomogeneous enhancement with circuitous feeding vessels in the tumor during the arterial phase and continuous enhancement in the venous and delayed phase.

关 键 词：孤立性纤维性肿瘤 腹膜后 计算机体层成像 

分 类 号：R735.4[医药卫生—肿瘤] R814.42[医药卫生—临床医学]