隆突性皮肤纤维肉瘤的CT和MRI影像学分析-附10例报道

The Imaging Findings of Dermatofibrosarcoma Protuberans on CT and MRI- 10 Cases Report

目的探讨隆突性皮肤纤维肉瘤(DFSP)的CT和MRI影像学表现。方法回顾经手术病理证实为DFSP的患者10例。10例中,男9例,女1例,年龄18岁~49岁,平均年龄34.5岁;5例行CT增强检查,5例行MRI增强检查。结果10例均为单发,腹壁3例,肩部2例,臀部、大腿、颌面部、胸壁、腋窝各1例。8例位于皮下脂肪层内,紧贴皮肤;2例位于皮肤,凸向体外,呈“悬吊征”。10例中,6例表现为圆形或类圆形;4例表现为分叶状或不规则状;肿块CT平扫表现为等密度,均未见钙化;MR表现为T1WI等信号,T2WI高信号,信号不均匀,CT及MRI增强扫描均呈不均匀明显强化,T2WI脂肪抑制为不均匀高信号,其内见少许条片状低信号。结论DFSP在CT和MRI有一定的影像学特征,依据这些特征可以对其做出较准确的诊断。

Objective To investigate the CT and MRI findings of dermatofibrosarcoma protuberans(DFSP).Methods Ten patients with DFSP confirmed by surgery and pathology were reviewed.Among the 10 cases,there were 9 males and 1 female,aged from 18 to 49 years,with an average age of 34.5 years.5 underwent enhanced CT and 5 underwent enhanced MRI.Results All the 10 cases were single,including 3 cases of abdominal wall,2 cases of shoulder,1 case of buttock,thigh,maxillofacial region,chest wall and axilla.8 cases were located in the subcutaneous fat layer,close to the skin.2 cases were located in the skin,protruding outward,presenting"suspension sign".Among the 10 cases,6 cases were round or quasi-circular.4 cases were lobulated or irregular.CT plain scan of the mass showed equal density and no calcification was found.MR showed equal signals of T1WI,high signals of T2WI and uneven signals.Both CT and MRI enhanced scans showed uneven and obvious enhancement.Fat inhibition of T2WI was uneven and high signals,with some flaky and low signals.Conclusion DFSP has certain imaging features in CT and MRI,which can be used to make accurate diagnosis.