【摘要】 目的　探讨MRI对巨细胞瘤的诊断价值及对其良恶性评估方面的意义。方法　男 4例 ,女 5例 ,年龄 14 6 8岁 ,平均 32岁。其中胫骨上端 5例 ,股骨远端 2例 ,桡骨远端 1例 ,肩胛骨 1例。全部病例有平片对照 ,7例有CT对照。 9例术后均行病理检查。结果　所有病例在T1WI上均呈等、低信号 ,T2 WI上均匀高信号 5例 ,呈不均匀高、等、低信号 4例。有骨皮质破坏 5例 ,3例无骨嵴 ,2例显示关节及软组织受累。 3例信号不均匀者大体病理呈暗红或棕褐色 ,5例信号较均匀者呈棕黄或黄色。结论　MRI、CT、X线比较 :( 1)在骨皮质破坏和骨嵴的显示方面 ,CT优于MRI。 ( 2 )显示骨外软组织及关节的受侵情况 ,MRI优于CT及X线。 ( 3)在定性诊断方面MRI无明显优势 ,但术前评估肿瘤范围方面MRI有明显优势更多还原

【Abstract】 Objective To evaluate the value of MRI in diagnosis of giant cell tumor of bone.Methods Nine cases with giant cell tumor of bone proved by pathology were examined preoperation with MRI and X-ray film.CT was processed in 7 caaes.There were 4 males and 5 females,with a mean age of 32(range 14~62 years).The location of the tumor was in the proximal tibia(5 cases),the distal femur(2 cases),the distal radius(1 case)and the scapula(1 case).Results In all cases,the signal intensity of the tumor was low to intermediate on T 1WI,high homogeneous signal intensity in 5 cases on T 2WI,heterogeneous signal intensity in 4 cases.There was destruction of cortical bone in 5 cases.There wasn’t osteoplaque in 3 cases.In 2 cases,the soft tissues and the joint were involved.The pathological macrosection tumor was crimson or brown in 3 cases with heterogeneous signal intensity on MRI.In another 5 cases with homogeneous signal intensity on MRI was brownish yellow or yellow.Conclusion Comparing the MRI,CT and X-ray film,diagnostic value of the giant cell tumor of bone,we believe:(1)CT scan is considered superior to MRI in showing the cortical bone destruction or in showing the osteoplaque.(2)MRI is considered superior to CT scan and X-ray film in showing the soft tissues the joint involvement.(3)MRI is fair super to evaluating the extension of the giant cell tumor of bone,but not super to quality diagnosis in the bone tumor.更多还原