胸膜外孤立性纤维瘤的CT和MRI表现:10例报告及文献复习  

CT and MRI manifestations of extrapleural solitary fibrous tumors:Ten cases report and literature review

作　　者：代月黎[1] 许乙凯[1] 林洁[2] 肖翔[1] 陈婉琪[1] 李维粤[1] 吴元魁[1] 

机构地区：[1]南方医科大学南方医院影像中心,广东广州510515 [2]南方医科大学南方医院病理科,广东广州510515

出　　处：《中国医学影像技术》2013年第10期1653-1656,共4页Chinese Journal of Medical Imaging Technology

摘　　要：目的 探讨胸膜外孤立性纤维瘤（ESFT）的CT和MRI表现.方法 回顾性分析10例经手术病理证实的ESFT的影像学资料,其中4例接受CT平扫加增强扫描,6例接受MRI平扫加增强扫描.结果 10例ESFT中,位于腹部3例,盆腔、枕骨大孔区SFT各2例,右侧颈根部、左眼眶、左颞部皮下SFT各1例;7例肿瘤呈圆形或卵圆形,3例呈分叶状;8例边界清楚,2例部分边界不清;肿瘤直径2.3~20.6cm,平均（7.78±6.82）cm.CT表现：1例呈囊实性,3例呈等密度实性,其中2例可见坏死、1例见多发钙化;增强后3例肿瘤实性部分渐进性强化,另1例为早期轻度强化.MRI表现：T1WI、T2WI均呈低信号1例,T1WI等信号、T2WI低信号1例,T1WI等信号、T2WI高信号3例,T1WI及T2WI均呈高信号1例;3例T2WI可见线样或片状低信号;增强后肿瘤均明显强化.结论 ESFT的影像学表现有一定特征;T2WI肿瘤主体呈低信号或肿瘤内部多发线样或片状低信号对诊断ESFT具有较高价值.Objective To investigate CT and MRI characteristics of extrapleural solitary fibrous tumors （ESFT）. Methods Imaging findings of 10 patients with ESFT proved pathologically were retrospectively analyzed, among them 4 underwent CT and 6 underwent MR scan. Results The lesions located in the abdomen （n=3）, pelvic cavity （n=2）, region of foramen magnum （n=2）, left orbit （n=1）, root of right neck （n=1） or left temporal subcutaneous region （n=1）. Seven lesions present as solitary round or oval, while 3 present as irregular masses. Borders of 8 lesions were clear, while of others were partly unclear. Diameters of the lesions ranged from 2.3 cm to 20.6 cm, with a mean of （7.78±6.82）cm. Plain CT showed solid combined with cystic component in 1 case and solid in 3 cases with isodensity, of which necrosis were seen in 2 and multiple calcification were seen in 1 case. The solid part of ESFT progressively enhanced in 3 cases and early mild enhancement in 1 case. On MRI, 1 case manifested as hypointensity on T1WI and T2WI, 1 as isointensity on T1WI and hypointensity on T2WI, 3 as isointensity on T1WI and hyperintensity on T2WI, and 1 as hyperintensity on both T1WI and T2WI. There were 3 cases showing string or patchy hypointensity on T2WI. Obvious enhancement of ESFT on postcontrast MR scans was observed in all 6 cases receiving MR scan. Conclusion ESFT has some specific imaging features. MR T2WI showing mainly hyperintensity tumor with string or patchy hypointensity is of high value for diagnosis of ESFT.

关 键 词：纤维瘤 体层摄影术 X线计算机 磁共振成像 

分 类 号：R737.9[医药卫生—肿瘤] R814.42[医药卫生—临床医学]