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目的探讨四肢软组织成人型纤维肉瘤的MR I表现。资料与方法回顾性分析经病理证实的四肢软组织成人型纤维肉瘤8例,总结其MR I特征。结果 8例成人型纤维肉瘤共18个瘤灶,其中单发6例,多发2例(12个瘤灶)。瘤灶呈分叶状7例(17个病灶),类圆形1例(1个病灶)。肿瘤最大者直径10.3 cm,最小者1.2 cm,平均5.8 cm。位于深筋膜下方7例(17个病灶),其中10个贴近深筋膜生长并见结节状突起,1例(2个病灶)突破深筋膜向外生长;位于肌肉间隙1例(1个病灶)。MR I平扫病灶主体T1W I呈低等信号,T2W I呈脑回状混杂信号;7例(17个病灶)伴周围肌肉水肿,3例(6个病灶)见囊变、坏死,1例(1个病灶)侵犯邻近骨质。4例增强扫描共13个病灶呈明显边缘性或“轮辐”状强化。结论 MR I能精确地显示病灶的组织结构、形态、范围,对肿瘤的诊断和鉴别诊断及分期有重要价值。
Objective To investigate MRI manifestations of soft tissue fibroblastic sarcoma in extremities. Materials and Methods 8 cases of pathologically confirmed adult fibrosarcoma of limbs and soft tissues were retrospectively analyzed, and their MR characteristics were summarized. Results 8 cases of adult fibrosarcoma with a total of 18 tumor lesions, including single in 6 cases, multiple in 2 cases (12 tumor). Tumor lesions were lobulated in 7 cases (17 lesions), round type in 1 case (1 lesion). The largest diameter of 10.3 cm, the smallest of 1.2 cm, an average of 5.8 cm. Seven cases (17 lesions) under the deep fascia were found. Ten of them were close to the deep fascia and saw nodular processes. One case (two lesions) broke through the deep fascia and grew out of the muscle space. One case (1 Lesions). The MR signal of T1WI was lower in T2WI than in T1WI in T2WI, 7 cases (17 lesions) with peripheral muscle edema, 3 cases (6 lesions) showed cystic degeneration and necrosis, and 1 case ( 1 lesions) violations of adjacent bone. A total of 13 lesions were significantly marginal or “spokes” -like in 4 cases. Conclusion MR I can accurately display the histological structure, shape and extent of the lesion and has important value in the diagnosis and differential diagnosis and staging of the tumor.