骨巨细胞瘤的影像学征象分析

Imaging Features Analysis of Bone Giant Cell Tumor

目的:分析骨巨细胞瘤的影像学表现,以提高对该病正确诊断的能力方法:回顾性分析28例经手术病理证实的骨巨细胞瘤的X线平片、CT及MRI的表现。结果:典型的X线表现为四肢长骨的骨端偏心、膨胀性、皂泡样、边缘清楚的骨质破坏:典型的CT表现为骨的偏心性、膨胀性破坏,骨皮质变薄,连续性可中断,肿瘤的边缘可见断续的骨质硬化,肿瘤内可见有短小的骨嵴:典型的MRI表现为长骨骨端偏心性骨异常信号区,T_1WI为中等信号,T_2WI为中、高混杂信号,可出现液-液平,肿瘤的边缘可有一相对比较规则的低信号线状影结论:骨巨细胞瘤的X线表现有一定特征,CT和MRI能清楚显示巨细胞瘤内部结构,腰骶部巨细胞瘤可清楚显示突入盆腔或腹腔内的软组织块影X线平片结合CT和MRI影像可显著提高骨巨细胞瘤的诊断准确率。

Objective To analyze the imaging features of bone giant cell tumor in order to improve its diagnostic accuracy. Methods The X-ray,CT and MRl performances of 28 cases with bone giant cell tumors proved pathologically were analyzed retrospectively.Results The typical X-ray features were eccentric,expanded,soap-bubble liked destruction of bone in long bone of four limbs;the common features in CT scans were also eccentric,expanded bone destruction which had a thinned cortex,cortical breakthrough in different degrees,a irregular peripheral sclerosis and ridge;the MRl imaging were secondary signal intensity on T_1W1,secondary to high or mixed signal intensity on T_2WI,normally with a band of low signal intensity around the tumor,occasionally with liquid-liquid level.Conclusion There are definite characteristic features of giant cell tumor in X-ray manifestations.The internal structure of giant cell tumors can be detected by CT and MRl,and soft tissue lump producing into the pelvic and abdominal cavities can be seen in lumbosacral giant cell tumors.X-ray examinations, combined with CT and MRI together can improve the diagnosis of the disease.Besides above,CT and MRI examinations can also help to facilitate surgical planning.