纤维肉瘤的影像学研究进展

Advances in radiological imaging of fibrosarcoma

纤维肉瘤是软组织肉瘤中较常见的一种,约占其中的10%,它是属于纤维母细胞/肌纤维母细胞性肿瘤,其中成人型纤维肉瘤和黏液型纤维肉瘤均归为恶性肿瘤。CT对软组织具有很好的密度分辨力和空间分辨力,是诊断软组织肉瘤的常用方法;MRI是软组织肿瘤的一种常用的无创性检测方法,其可以清晰显示肿瘤位置、体积、边界、形态、信号特点和周围结构的比邻关系等,还能观察有无淋巴结转移和远处转移扩散。成人型纤维肉瘤CT主要表现为类圆形或分叶状的软组织密度肿块阴影,密度不均,增强扫描呈不均匀强化;MRI表现为T 1WI均呈低、等信号,T 2WI大部分呈现脑回状混杂高信号。黏液型纤维肉瘤CT呈分叶状或类圆形,表现为等、低密度肿块影,部分病灶内部可见条索状分隔影;MRI表现为T 1WI主要以低信号、等低信号为主,T 2WI信号比较复杂,其信号特点与病理密切相关。

Fibrosarcoma is a common form of soft tissue sarcoma,accounting for about 10%of it.It is a fibroblast/myofibroblast tumor.Adult fibrosarcoma and myxofibrosarcoma are classified as malignant tumors.CT has good density resolution and spatial resolution for soft tissue.It is a common method for diagnosing soft tissue sarcoma.Magnetic resonance imaging(MRI)is a commonly used non-invasive detection method for soft tissue tumors.It can not only clearly show the location and volume of tumors,border,morphology,signal characteristics,and neighboring structures,but also observe whether there is lymph node metastasis and distant metastasis.The appearance of adult fibrosarcoma on CT is a circular or lobular soft tissue density shadow,with uneven density and uneven enhancement on enhanced scans.MRI shows hypo-and hypo-intensity signals on T 1WI,and the presentation of brain mixed high signal on T 2WI.Myxofibrosarcoma is lobulated or round in shape on CT.The lesions show iso-and low-density masses.Part of the lesions show cord-like segregation.On MRI,the main signals are hypo-and hypo-intensity signals on T 1WI.The signal on T 2WI is more complex and its signal characteristics are closely related to pathology.