骨样骨瘤的影像表现及鉴别诊断

Image Characteristics and Differential Diagnosis of Osteoid Osteoma

目的:分析骨样骨瘤的X线及CT影像表现,探讨其影像学特点。方法:整理经手术病理证实的骨样骨瘤12例,男8例,女4例。所有病例均行X线、CT检查,分析骨样骨瘤在X线、CT上的表现及其对瘤巢及瘤巢周围改变的显示能力,总结其特征性的影像学表现。结果:12例病灶均表现为圆形或类圆形透亮区,直径0.5～1.5 cm,平均0.9 cm,其周围有不同程度的骨质硬化。12例X线平片仅8例显示瘤巢,12例行CT检查者均清楚显示瘤巢,X线和CT对瘤巢显示率分别为66.7%(8/12)和100%(12/12)。结论:瘤巢是确诊骨样骨瘤的关键,X线平片仍然是诊断骨样骨瘤的重要方法,CT是显示瘤巢的最佳方法。

Objective To analyze the characteristics of osteoid osteoma on X-ray and CT imaging.Methods X-ray and CT imaging of 12 cases of osteoid osteoma proved by surgery and pathology were retrospectively analyzed and collected, including 8 males and 4 females.The X-ray and CT imaging manifestations of osteoid osteoma and their display capabilities of tumor niduses and changes around the tumor niduses were analyzed,and their characteristic imaging features were summarized.Results The imaging manifestations of osteoid osteoma revealed a circular or oval radiolucency（nidus） with different bone sclerosis around the nidus.The diameter ranged from 0.5cm to 1.5cm,with the average of 0.9cm.Among 12 cases,only 8 cases showed nidus on X-ray plain film,all 12 cases with CT scanning showed nidus.The detection rate of nidus was 66.7%（8/12） for X-ray plain film and 100%（12/12） for CT,respectively.Conclusion The tumor nidus is the key to the diagnosis of osteoid osteoma,X -ray imaging of osteoid osteoma is quite typical and CT is a best modality for diagnosis of the disease.