| 李洋,郝大鹏,左安俊,于俪媛,郑园园,刘吉华,徐文坚.颅骨动脉瘤样骨囊肿CT及MRI表现[J].中国医学影像技术,2015,31(12):1797~1800 |
| 颅骨动脉瘤样骨囊肿CT及MRI表现 |
| CT and MRI manifestations of aneurysmal bone cyst of skull |
| 投稿时间：2015-04-28 修订日期：2015-10-01 |
| DOI：10.13929/j.1003-3289.2015.12.007 |
| 中文关键词: 动脉瘤样骨囊肿 颅骨 体层摄影术,X线计算机 磁共振成像 |
| 英文关键词:Aneurysmal bone cyst Skull Tomography, X-ray Computed Magnetic resonance imaging |
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| 中文摘要: |
| 目的 观察颅骨动脉瘤样骨囊肿的CT和MRI表现。方法 回顾性分析8例经手术病理证实的颅骨ABC患者的CT和MRI图像,发生于脑颅骨者5例,其中枕骨3例,顶骨1例,颞顶枕骨1例,发生于颌骨2例,发生于颅中凹1例、累及蝶骨、颞颌关节。对8例均行CT平扫和MRI常规平扫,位于脑颅骨的5例同时行MR常规增强扫描,位于颅中凹的1例加做MR动态增强扫描、并后处理得到时间-信号强度曲线(TIC)及其半定量参数。结果 CT表现:8例均表现为单房或多房状膨胀性骨质破坏区伴内部骨质分隔影,其内软组织肿块密度不均匀,内见斑片状低密度区。位于颅中凹的1例骨质破坏范围较大,对周围组织具有侵袭性。MRI表现:8例病变均表现为病变主体呈等长T1长T2信号,病变内部含有数量、大小不等的囊性部分,信号不均一,其中5例病灶囊内可见液-液平面,8例病变边缘均可见低信号界线。位于颅中凹的1例TIC呈平坦型,峰值信号强度(SIpeak)为1080,峰值时间(Tpeak)为第9个时相,最大上升斜率(MSI)为0.81%。结论 颅骨ABC具有较为典型的影像学征象。 |
| 英文摘要: |
| Objective To observe the CT and MRI findings of aneurysmal bone cyst of skull. Methods The CT and MRI features of eight patients with aneurysmal bone cyst of skull confirmed pathologically were analyzed retrospectively. The tumor mainly occurred in cranium in five cases, two cases in maxillofacial bone, one case in middle cranial fossa, which involved sphenoid bone and temporomandibular joint. CT scan and routine MR scan were performed in all eight patients. Contrast-enhanced MRI was performed in five cases which involved cranium. Dynamic contrast MRI was performed in the case occured in middle cranial fossa, and then the time-intensity curves (TIC) was analyzed to obtained semi-quantitative parameters. Results On CT images, all eight lesions presented as expanded destruction with single or multiple cavities and many bone separations occured in the lesions. All eight tumors presented inhomogeneous density and patchy low density region. The case occured in the middle cranial fossa presented invasiveness and a wide range of bone destruction. On MRI images, main parts of the eight lesions showed long T1 and long T2 signal with different numbers and sizes of cysts and the signal of the cysts was mixed. Five cases showed fluid-fluid level in the cysts and all eight cases showed low signal edges. In the lesion in the middle cranial fossa, obviously inhomogeneous enhancement occured, and the TIC showed flat pattern, peak signal intensity (SIpeak) was 1080, time to peak (Tpeak) was in the ninth period, and maximal slope increasing (MSI) was 0.81%. Conclusion Aneurysmal bone cyst of skull has some typical CT and MRI features. |
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