隆突性皮肤纤维肉瘤影像学表现

目的探讨隆突性皮肤纤维肉瘤(DFSP)的影像学表现。方法回顾性分析9例DFSP患者的影像资料,结合病理分析其影像学特点。结果 9例患者均为单发病灶,均发生于皮肤或皮肤下,其中四肢4例、躯干5例。8例表现为皮下软组织肿块,6例呈圆形或类圆形,边缘较清晰,2例呈分叶状肿块,并沿周围肌肉间隙生长,1例大部分边界模糊;1例悬吊于皮肤外,呈分叶状。2例CT平扫病灶呈中等略低密度,多均匀或略不均匀;MRI示7例病灶呈较均匀等或稍长T1信号,1例呈不均匀稍短T1信号,6例呈不均匀稍长T2信号,可伴小斑片状、条索状稍短T2信号或小斑片状长T2信号,2例呈长T2信号,1例伴环状稍短T2信号;5例增强后明显强化,其中4例强化不均匀。结论 DFSP的影像学表现具有一定特征性,尤其MRI对定性诊断及术前评估有重要的临床应用价值。

Imaging features of dermatofibrosarcoma protuberan

Objective To investigate the image features of dermatofibrosarcoma protuberan (DFSP). Methods Images of 9 cases with DFSP were reviewed, and the CT, MR images and pathological appearances were observed. Results All cases were solitary mass, located in skin or subcutaneous tissue; 4 cases located in the limbs, and the others were in the trunk. Eight cases were subcutaneous soft tissue masses, and 6 cases manifested as round or oval with clear boundary, 2 cases with lobulated shape grow into muscular septum, 1 case had indistinct boundary; 1 case was outside the skin with overhanging and lobulated. Two cases of CT scan displayed moderate slightly low density with uniform or slightly uneven. The mass of 7 cases showed even equal or low signal and 1 case showed uneven high signal on T1WI, and 6 cases showed uneven high signal accompanying plaque-like low or high T2 signal region, and 2 case showed high signal of which 1 case with circle low signal region on T2WI. All 5 cases displyed obviously enhanced, but 4 cases were unevenly enhanced association with plaque-like low signal region. Conclusion Imaging features of DFSP have some characteristics, and MRI is valuable to etiologic diagnosis and preoperative evaluation.