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目的:了解腹部外硬纤维瘤的MR成像特征。方法:对经手术病理证实的10例硬纤维瘤的MR图像进行回顾性分析。所有的病例均采用Siemens Magnetom Vision1.5T超导全身MR扫描仪,10例常规行T1WI和T2WI,9例行MR增强扫描。结果:10例腹部外硬纤维瘤中,韧带状纤维瘤1例;侵袭性纤维瘤病9例,其中颈项部3例,右肩背部3例,右大腿2例,左上臂2例。肿瘤的平均大小约为10cm×7cm×5cm。除1例韧带状纤维瘤有包膜,边缘清楚外,其余肿块没有包膜,边界不清。所有肿块的信号欠均匀,在T1WI、T2WI及增强扫描像上可见低信号的纤维成分,肿块的非纤维成分在T1WI上与肌肉信号相同,在T2WI上的信号高于肌肉小于脂肪,呈明显强化。1例颈项部侵袭性纤维瘤病伴有邻近肌肉的广泛浸润,1例侵犯右肩胛骨部分内缘。结论:虽然硬纤维瘤与恶性肿瘤的MR信号有相似之处,但它在T1WI和T2WI上及增强扫描像上显示的低信号纤维成分,可以与软组织恶性肿瘤相鉴别。
OBJECTIVE: To understand MR imaging features of abdomen epidural fibroma. Methods: The MR images of 10 cases of hard fibroma confirmed by surgery and pathology were retrospectively analyzed. All cases were performed with Siemens Magnetom Vision 1.5T superconducting full-body MR scanner, 10 routine T1WI and T2WI, 9 MR enhanced scan. Results: In 10 cases of abdomen epidural fibroma, 1 case of fibroid fibroma and 9 cases of invasive fibromatosis. There were 3 cases of neck, 3 cases of right shoulder and back, 2 cases of right thigh and 2 cases of left upper arm. The average tumor size is about 10 cm × 7 cm × 5 cm. In addition to a case of ligamentous fibroids are enveloped, clear edge, the remaining mass is not coated, the border is unclear. The signals of all lumps were not uniform, and the signal components of low signal were visible on T1WI, T2WI and enhanced scan images. The non-fibrous components of the lumps were the same as the muscle signals on T1WI and the signals on T2WI were higher than those of muscles less than fat, . One case of invasive neck fibroadenopathy with extensive infiltration of adjacent muscles, one case violated the right shoulder blade part of the inner edge. CONCLUSIONS: Although there are similarities between MR signals of malignant tumors and hard-fiber tumors, the low-signal fiber components displayed on T1WI and T2WI and on enhanced scan images can be differentiated from soft-tissue malignancies.