膝周慢性骨髓炎与骨肉瘤的低场MRI鉴别诊断

摘要

Objective:To investigate the value of low ifeld MRI in the differential diagnosis of chronic osteomyelitis with osteosarcoma around the knee.Method:A retrospective review of the 0.35T MRI data of chronic osteomyelitis (15 cases) and osteosarcoma (6 cases) confirmed clinically,the related literatures were also reviewed.Results:All patients were with bone destruction and bone sclerosis.The lesions scattered patchy distribution,“Penumbra sign”, “Sinus sign” and “Mass effusion around the bone syndrome” were more speciifc signs of chronic osteomyelitis. The lesions showed continuous distribution,presenting as “Stiff sign” and “Codman triangle sign” were more common in osteosarcoma.Conclusion:Understanding the low ifeld MRI features is helpful to the diagnosis and differential diagnosis of chronic osteomyelitis and osteosarcoma around the knee.%目的：探讨低场MRI对膝周慢性骨髓炎与骨肉瘤的鉴别诊断价值。方法：回顾性分析临床证实的膝周长骨慢性骨髓炎（15例）和骨肉瘤（6例）0.35T MRI资料并复习文献。结果：两组均有骨破坏及骨硬化。病变散在条片状分布，半影征、骨周大量积液征、窦道征为慢性骨髓炎较为特异的征象；而病变较连续分布并呈僵硬征及Codman三角征更多见于骨肉瘤。结论：熟悉膝周慢性骨髓炎与骨肉瘤的低场MRI表现特点有助于诊断及鉴别诊断。