软骨黏液样纤维瘤的影像诊断

Imaging diagnosis of chondromyxoid fibroma

目的 分析软骨黏液样纤维瘤的影像表现特点,提高诊断正确率.方法 回顾性分析经手术病理证实的8例软骨黏液样纤维瘤的X线、CT及MRI表现.结果 8例均发生于长管状骨.X线上病灶为卵圆形偏侧透亮区,边界清楚,边缘硬化,6例内部见粗大纵行骨嵴或粗大网状分隔.CT上病灶为边界清楚、边缘硬化,1例见小点状高密度钙化影.MRI上T1WI为低或中低信号,T2WI上为较高信号,1例病灶边缘有等T1、稍高T2信号影围绕.2例静脉注射钆喷酸葡胺后T1WI扫描病灶呈弥漫强化,其中1例周围见较明显线状强化.结论 软骨黏液样纤维瘤在影像表现上有一定特点,结合X线、CT及MRI可与其他影像表现相似的骨肿瘤进行鉴别.

Objective To analyze the imaging manifestations of chondromyxoid fibroma,so as to improve diagnostic accuracy.Methods The X-ray,CT and MRI manifestations of 8 cases with chondromyxoid fibroma confirmed by surgical pathology were analyzed retrospectively.Results All of 8 cases were in the long tubular bones.X-ray showed oval,well defined,eccentric,radiolucent lesion with surrounding sclerosis.The thick dense bony or coarse reticular septation were seen in 6 cases.CT scan showed osteolytic,surrounding sclerosis,and 1 case with foci of calcification.MRI images showed a low or medium signal on T1WI,high signal on T2WI,1 case with a equal T1WI and slight high T2WI signal intensity peripheral rim around.Two cases with diffused enhancement on T1WI after intravenous injection of gapentetate acid meglumine injection and a peripheral liner enhancement in 1 case.Conclusion Chondromyxoid fibroma has certain imaging characteristics,but should be combined with X-ray,CT and MRI to differentiate from other bone tumors with similar imaging manifestations.