骨样骨瘤的影像诊断

目的探讨骨样骨瘤的X线、CT与MR表现。方法搜集我院2006—2007年经手术病理证实的骨样骨瘤20例,其中男性12例,女性8例,年龄11~37岁,平均年龄24岁。所有病例均行X线检查,其中行CT检查者6例,行MR检查者8例。分析上述3种影像检查对骨样骨瘤瘤巢的显示率。结果在常规X线检查中20例病灶均表现为一圆形或卵圆形的透亮区,直径>5~16 mm,周围可见不同程度的骨质硬化;其中16例可以看到瘤巢,显示率为80%;6例经CT薄层扫描均可清楚显示瘤巢,显示率为100%;8例行MR检查,其中6例可显示瘤巢,并可见瘤巢周围的软组织肿胀,瘤巢显示率为75%。结论瘤巢是确诊骨样骨瘤的关键。常规X线是诊断骨样骨瘤的首先检查方法,CT是显示瘤巢最可靠的方法,MR显示瘤巢不如CT敏感,但却可以清楚的显示瘤巢周围的软组织肿胀情况。

The Imaging Diagnosis of Osteoid Ostema

Objective To explore X-Ray,CT and MR manifestations of osteoid osteoma.Methods the information of 20 cases of osteoid osteoma proved by surgical pathology were collected,including 12 males and 8 female aged from 11 to 37 years,the average age is 24 years.all patients had plain films,6 were imaged with CT scanning,8 with MR imaging.The imaging findings of osteoid osteoma and the ability of X-ray,CT.and MRI in demonstrating the nidus were analyzed.Results In conventional X-ray examination,20 cases of lesions appeared as a round or oval of translucent zone,diameter of approximately 5~16mm,can be seen around the varying degrees of bone sclerosis,tumor nests can be seen in 16 cases,display rate of 80%;6 cases by CT scan can clearly show thin tumor nests,display rate of 100%;Tumor nests can be seen in 6 out of 8 cases by MR scan,display rate of 75%.Conclusion Tumor nests is the keypoint in confirming osteoid osteoma.Conventional X-ray diagnosis of osteoid osteoma is the first examination step,CT is the most reliable way to show tumor nest,MR is less sensitive than CT in showing tumor nests,but it can clearly show soft tissue swelling situation around the tumor nests.