隆突性皮肤纤维肉瘤的MRI诊断价值研究

Research for Diagnostic Significance of MRI in Dermatofibrosarcoma protuberans

目的分析隆突性皮肤纤维肉瘤（DFSP）的MRI表现,探讨MRI对DFSP的诊断价值。方法回顾性分析12例经病理证实的DFSP患者的影像资料,男7例、女5例,总结其影像特点。结果 12例病变位置均较表浅,3例与皮肤分界不清,9例分界清,其中8例与皮肤间距离〈3 mm,1例〉5 mm。病变大小3.2～15.6 cm,平均8cm。病变形态呈扁丘状、卵圆形、分叶状,3例呈多结节聚合状,1例见子结节外突。与肌肉相比,在T1WI上3例呈稍低信号,5例呈等信号,4例呈稍高信号;在T2WI上11例呈高信号,1例为稍高信号。6例行增强检查,5例明显强化,1例呈中度强化。结论 DFSP的MRI表现具有一定特征性,MRI检查可帮助其诊断。

Objective To explore the diagnostic significance of MRI in dermatofibrosarcoma protuberans（ DFSP） by analyzing MRI imaging features of DFSP. Methods Analyze MRI images of 12 lesions confirmed as DFSP by pathology,including 7 male and 5 female. Results All 12 lesions are superficial and very adjacent to the skin. There is no clear limit between 3 lesions and skin. In the remaining 9 lesions,there is a clear limit. In these 9 lesions,the distance between8 lesions and skin is less than 3 mm,but only 1 lesion has a distance more than 5 mm. The maximum diameters of 12 lesions vary within the range between 3. 2 cm and 15. 6 cm（ 8 cm on average）. The 12 lesions have various morphology（ flat dune-like,oval and lobular）. 3 lesions are multi-nodular,and l lesion has outward sub-nodule. Compared to muscles,3lesions are slightly hypointense on T1 WI,5 lesions isointense,4 lesions slightly hyperintense. 11 lesions are hyperintense on T2 WI,while 1 lesion is slightly hyperintense. In 6 enhanced lesions,5 lesions are strongly enhancing while 1 lesion is moderate. Conclusion DFSP have characteristic features in MRI,and MRI examination can help diagnose DFSP.