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目的 :分析骨样骨瘤的X线、CT和MRI表现 ,评价它们的诊断价值。方法 :经手术病理证实 ,同时有X线、CT和MRI检查的骨样骨瘤 2 2例 ,其中男 19例 ,女 3例。分析X线、CT和MRI对瘤巢和瘤巢周围改变的显示能力。结果 :X线、CT和MRI分别有 17、2 2和 2 0例表现为有一圆形或卵圆形小于 2cm的瘤巢 ,瘤巢周围可有程度不一的骨质硬化、骨膜反应、软组织及骨髓腔水肿或相邻关节的肿胀。X线诊断的准确率为 77.3 % (17/ 2 2 ) ;CT诊断的准确率为 10 0 % (2 2 / 2 2 ) ;MR诊断的准确率为 90 .9% (2 0 / 2 2 )。结论 :大多数的骨样骨瘤具有较典型的影像学表现 ,易于诊断 ,其中以CT对瘤巢的定位最为准确 ,单凭X线或MR的表现可因未能显示瘤巢而误、漏诊。
Objective: To analyze the X-ray, CT and MRI features of osteoid osteoma and evaluate their diagnostic value. METHODS: Twenty-two cases of osteoid osteoma were examined by pathology. X-ray, CT and MRI examinations included 19 males and 3 females. Analyze the ability of X-ray, CT, and MRI to show changes in the tumor nest and around the tumor nest. Results: There were 17, 22, and 20 cases of X-ray, CT, and MRI, respectively. There was a tumor nest with a round or ovoid shape less than 2 cm. There were varying degrees of osteosclerosis, periosteum reaction, and soft tissue around the tumor nest. And bone marrow cavity edema or swelling of adjacent joints. The accuracy of X-ray diagnosis was 77.3% (17/22); the accuracy of CT diagnosis was 100% (22/22); the accuracy of MR diagnosis was 90.9% (20/22). . Conclusion: Most osteoid osteomas have typical imaging findings and are easily diagnosed. The location of tumor nests by CT is the most accurate. X-ray or MR manifestations can be misdiagnosed because of failure to display the tumor nests. .