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目的回顾分析韧带样纤维瘤(desmoid-type fibromatoses,DF)的CT和MRI表现及其病理基础,探讨其影像学诊断价值。资料与方法搜集经手术病理证实的DF患者20例,男8例,女12例。9例进行CT检查(增强7例),9例行MRI检查(增强8例),2例行CT、MRI平扫及增强扫描。分析其CT及MRI表现,并与组织病理学进行对照分析。结果 20例中共检出25个病灶,其中腹部外型18个,腹壁型4个,腹内型2个,骶骨1个;17个病灶形态不规则,8个呈椭圆形。CT平扫均表现为均匀软组织密度。与肌肉信号相比,MR T1WI上呈等信号7个,稍低信号6个;T2WI呈高或稍高信号9个,2个呈混杂信号,1个呈低信号。所有病灶内均可见条索状、片状T1WI及T2WI上均呈低信号改变的区域;增强扫描10例均呈中等以上强化。结论 DF的CT和MRI特征较明显,对多数病变术前进行定性诊断是可能的。
Objective To retrospectively analyze the CT and MRI findings of the desmoid-type fibromatoses (DF) and its pathological basis, and to explore its diagnostic value. Materials and Methods Twenty patients with DF confirmed by pathology were collected, including 8 males and 12 females. Nine patients underwent CT examination (enhancement of 7 cases), 9 cases of MRI examination (enhanced 8 cases), 2 cases of CT, MRI plain scan and enhanced scan. The CT and MRI findings were analyzed and compared with histopathology. Results Twenty-five lesions were detected in 20 cases, including 18 abdomen abdomen, 4 abdominal abdomen, 2 abdominal abdomen and 1 sacrum. 17 lesions were irregular and 8 were oval. CT scan showed uniform soft tissue density. Compared with muscle signal, MR T1WI showed equal signal on the 7, slightly lower signal 6; T2WI showed high or slightly high signal 9, 2 were mixed signal, a low signal. All lesions were visible in the cord-like, sheet T1WI and T2WI were low signal changes in the area; enhanced scan in 10 cases were moderate to above enhancement. Conclusion The CT and MRI features of DF are obvious. It is possible to diagnose most of the lesions preoperatively.