侵袭性纤维瘤病的CT和MRI表现

目的:探讨CT和MRI在侵袭性纤维瘤病中的诊断价值.方法:回顾性分析20例经手术或病理证实的侵袭性纤维瘤病的CT和MRI表现.结果:瘤体发生于四肢8例,躯干12例,直径2.5～17.0 cm,CT平扫与肌肉对比呈等密度者14例,稍高密度者6例,多数呈渐进性强化,强化不均.瘤体在MRI T1WI上呈等低信号,在T2WI上...

CT and MRI manifestations of aggressive fibromatosis

Objective：To investigate the diagnostic value of CT and MRI in aggressive fibromatosis.Methods：CT and MRI findings of 20 patients with surgically and pathologically proven aggressive fibromatosis were analyzed retrospectively.Results：There were 8 cases in limbs and 12 cases in trunk.The diameter of the tumors varied from 2.5~17.0cm.The tumors showed isodensity in 14 cases and high density in 6 cases relative to muscle.On contrast-enhanced CT scan,the tumors were generally characterized by progressive heterogeneity enhancement with ill-or well-defined margins.At MRI,aggressive fibromatosis had low signal intensity on T1-weighed images and high signal intensity on T2-weighted images with heterogeneity enhancement.The tumors extended usually to spatium intermusculare.It was observed that 2 cases had adjacent muscle edema and 3 cases destruction of bone.Conclusion：The CT and MRI features of aggressive fibromatosis are specific,which are valuable in detecting and differentiating this disease.MRI is superior to CT scan in defining the pattern and the extent of involvement,detecting recurrence after surgery and monitoring adjuvant therapy.