【摘要】 目的 探讨MRI“皂泡征”和“环征”对骨巨细胞瘤（GCT）的定性诊断价值。方法 分别用MRI“皂泡征”、“环征”、“皂泡征”+“环征”对200例骨肿瘤或肿瘤样病变进行GCT的预判,并与病理结果对照,其中骨巨细胞瘤有22例。结果 （1）“皂泡征”:病变内≥3个的圆形“皂泡样”小囊,呈水样长T₁、长T₂信号,边缘光滑清晰,增强扫描无强化;“环征”:病变边缘T₁WI、T₂ WI像有完整或不完整的低信号带;（2）“皂泡征”诊断骨巨细胞瘤的敏感性为95.45%,特异性为97.75%,诊断正确率达97.5%;“环征”的诊断敏感性为100%,特异性为75.84%,诊断正确率78.5%;“皂泡征”+“环征”的诊断敏感性为95.45%,特异性为99.44%,诊断正确率达99%。结论 MRI“皂泡征”+“环征”诊断GCT的敏感性好、特异性高,具有很高的定性诊断价值。更多还原

【Abstract】 Objective To evaluate the qualitative diagnostic value of "soap bubble sign" and "ring sign " of MRI for bone giant cell tumor.Methods The diagnosis of giant cell tumors（GCT） was predicted in 200 cases of bone neoplasms or tumor-like lesions proved pathologically（including 22 cases of GCT） with "soap bubble sign", "ring sign", "soap bubble sign" and in combination with "ring sign " on MR images,respectively and compared with pathological data.Results（1） The "soap bubble sign " that was over 3round "soap bubble-like" cysts with clear margin inside the lesions,which were hypointensity on T₁ WI and hyperintensity on T2 WI,meanwhile no contrast-enhancement showed after Gd-DTPA injected.The "ring sign" revealed integrated or unintegrated hypointense circle.（2） In diagnosing GCT by MRI,the sensitivity,specificity and accuracy were 95.45%,97.75% and 97.5% based on "soap bubble sign" 100%,75.84% and 78.5% based on "ring sign",and 95.45 %,99.44% and 99% based on both "soap bubble sign" and "ring sign",respectively.Conclusion "soap bubble sign" combined with "ring sign" are of important value in preoperative evaluation of bone giant cell tumor.更多还原