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目的分析动脉瘤样骨囊肿(ABC)的影像学特点,以提高对该病的认识。方法对15例经手术病理证实的ABC的影像学表现进行回顾性分析。15例均摄X线平片,13例CT扫描,12例MRI扫描。结果 15例ABC发生于长管状骨13例,横突2例。13例病变呈膨胀性骨质破坏,9例病变边缘可见硬化,3例合并病理性骨折,10例病变内密度或信号不均匀,10例可见典型的液-液平面,3例病变周围可见软组织改变。X线平片和CT多表现为偏心膨胀性骨质破坏,CT常可显示骨性分隔及液-液平面,MRI多表现为多囊长T1、长T2信号及液-液平面。结论 CT和MRI对ABC诊断较X线平片有优势,综合影像学检查能提高ABC的诊断符合率。
Objective To analyze the imaging features of aneurysmal bone cyst (ABC) in order to improve the understanding of the disease. Methods Retrospective analysis was performed on the imaging findings of ABC in 15 cases confirmed by surgery and pathology. 15 cases were taken X-ray, 13 cases of CT scan, 12 cases of MRI scan. Results Fifteen cases of ABC occurred in 13 cases of long tubular bone and 2 cases of transverse process. Thirteen cases showed expansive bone destruction, nine cases showed sclerosis on the margin, three cases had pathological fracture, the density or signal was not uniform in 10 cases, and the typical liquid-liquid level was found in 10 cases. Soft tissue was seen in 3 cases change. X-ray and CT showed eccentric expansion of bone destruction, CT can often show the bony separation and liquid-liquid level, MRI showed multi-cystic T1, T2 signal and liquid-liquid level. Conclusion CT and MRI diagnosis of ABC than plain film has the advantage of comprehensive imaging examination can improve the diagnostic accuracy of ABC.