纤维性骨皮质缺损的MRI诊断与鉴别诊断

目的探讨纤维性骨皮质缺损的MRI表现及其鉴别诊断。方法对32例经随访观察1～4年（26例）、临床病理证实（6例）的纤维性骨皮质缺损患者的临床资料及MRI表现进行分析,并加以鉴别诊断。结果 32例纤维性骨皮质缺损中,位于股骨远侧干骺端16例,股骨骨干下段3例,股骨近侧干骺端3例,胫骨近侧干骺端8例,胫骨骨干上段2例;右侧17例,左侧15例;且病灶大多位于病骨后侧份,内侧份皮质区;病灶大多呈类圆形、椭圆形,边界清楚,周围未见骨膜反应及软组织肿胀,病灶大小约0.5～2.6cm,多呈稍长T1稍长T2、稍短T2信号,并周围见低信号线样改变,11例增强扫描均有不同程度强化,多为轻～中度。14例经随访观察,其中7例病灶无改变,5例病灶稍有缩小,2例发展为非骨化性纤维瘤。结论纤维骨皮质缺损的MRI表现有一定的特征性,有助于该病的诊断,并能进行鉴别诊断。

MRI Findings of fibrous cortical defect and differential diagnosis

Objective To discuss the value of MRI in diagnosis and differential diagnosis of fibrous cortical defect.Methods The MRI findings and clinical materialsof 32 cases with fibrous cortical defect were retrospectively analyzed.26 cases were followed-up 1～4 years.6 cases were proved by operation and pathology.Results There were 32 case at long bone including 6 cases at distal metaphysis of femur,3 cases at hypomere diaphysis of femur,3 at roximal metaphysic,8 cases at proximal malmetaphysis of tibia of femur and 2 cases at epimere diaphysis of tibia.The boundary was clear without the periosteum response and the soft tissue swelling around.The size of the lesions was about 0.5～2.6cm.All lesions edge had the line type low signal change.Conclusion MRI Findings of fibrous cortical defect has certain characteristic value,contribute to diagnosis of the disease and differential diagnosis from others.