侵袭性纤维瘤病的MRI特征

MRI features of aggressive fibromatosis

目的探讨侵袭性纤维瘤病的MR特征。方法对11例经手术病理证实的侵袭性纤维瘤病MRI征象进行回顾性分析。结果 11例侵性纤维瘤病表现为腹内或腹壁软组织肿块,肿块呈圆形、类圆形或不规则形、爪形。MRI检查,T2WI病灶均呈稍高信号;T1WI呈等信号6例,呈稍低信号3例,呈稍高信号2例;脂肪抑制T2像,病灶呈明显高信号,并能清晰显示肿瘤的边界及范围。其中4例病灶在各序列均见有条带状致密胶原纤维形成的低信号影。动态增强扫描动脉期及静脉期病灶轻中度不均匀强化,延迟期病灶明显强化并趋于均匀。其中4例病灶周边及内部残留有斑片状、条状无强化稍低密度区。结论侵袭性纤维瘤病的MRI表现具有一定特征性,MRI检查对该病有较高的诊断价值。

Objective To investigate the appearances of aggressive fibromatosis on MRI. Methods MRI findings of 11 patients with pathology proved aggressive fibromatosis were analyzed retrospectively. Results The masses were intraab- dominal or in abdominal wall. The masses were expanded and round or round-like or infiltrative and irregular. 11 cases were found slightly high signal on T2WI, isosignal in 6 cases, slightly low signal in 3 cases, slightly high signal in 2 cases on T1WI on MRI imaging, and were high signal on fat inhibition imaging, the edges and borders of masses were clear, low signal on all pulse sequences were seen in 4 eases. Enhancement was light and moderate on arterial and venous stage, intense enhancement uniformly on delayed stage. Some area had no enhancement in 4 cases. Conclusion The appearances of aggressive fibromatosis on MRI were relatively specific. MRI can be a valuable tool for the diagnosis on aggressive fibromatosis.