脊柱动脉瘤样骨囊肿的CT、MRI诊断

目的：分析脊柱动脉瘤样骨囊肿的CT、MRI表现，提高对该病的CT、MRI诊断和鉴别诊断。方法：回顾性分析经临床病理证实的12例脊柱动脉瘤样骨囊肿的CT、MRI表现。结果：12例脊柱动脉瘤样骨囊肿患者中颈椎3例，胸椎6例，腰椎3例；单独椎体侵犯1例，单发于椎板2例，同时累及椎体及附件者9例。CT表现局限性囊状或膨胀性骨质破坏，边界清晰，内可见分房骨嵴影，4例可见内部多发液一液平面影。MRI示膨胀性溶骨性破坏灶周围可见低信号影包绕，病灶内呈多发分房状改变，T1WI呈不均匀低／等信号；T2WI呈数个大小不等的高／等信号囊腔，10例可见不同信号强度的液一液平面影。增强扫描可见囊腔周缘明显强化，腔内出血和液体无强化。结论：脊柱动脉瘤样骨囊肿CT、MRI表现具有一定的特征性，能够做出正确诊断。

The CT and MRI diagnosis in aneurysmal bone cyst of spine

Objective：To analyze the CT and MR manifestations of aneurysmal bone cyst of spine and enhance the competence of CT and MR diagnosis. Methods：Respectively analyze MRI of 12 eases aneurysmal bone cyst of spine confirmed by clinical pathology.Resuits：In all cases 3 located in cervical vertebra, 6 in thoracic vertebra, 3 in lumbar vertebrae; 1 only encroached on vertebra, 2 located in vertebral plate, 9 involved in vertebra and appendix simultaneously. CT scans presented local or dilated capsular destruction of bone, sharpness of border, and found multiple chamber and bone crist in it. 4 were found multiple fluid-fluid levels. In MILl the lesion showed inhomogeneous signal on T1WI and different sized high/homogenous signal capsular space on T2WI. 10 were found fluid - fluid levels. Contrast enhancement MRI displayed obvious enhancement in capsular circumferential, interior hemorrhage and fluid did not enhanced. Conclusion： Aneurysmal bone cyst of spine has some features in CT and MRI manifestation, and according to it we can make a precise diagnesis.