颅骨动脉瘤样骨囊肿CT及MRI表现

发布时间：2018-12-07 14:12

【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(SI_(peak))为1080,峰值时间(T_(peak))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。
[Abstract]:Objective to observe the CT and MRI findings of intracranial aneurysm like bone cysts. Methods the CT and MRI images of 8 patients with ABC proved by surgery and pathology were retrospectively analyzed. 5 cases occurred in cranium, including 3 occipital, 1 parietal, 1 temporoparietal occipital, 2 maxillary, 1 middle cranial fossa. Involving the sphenoid, temporomandibular joint. CT and MRI were performed in 8 cases, MR was performed in 5 cases at the same time, and dynamic enhanced MR was performed in 1 case in the middle fossa of the skull. The time-signal intensity curve (TIC) and its semi-quantitative parameters were obtained by post-processing. Results CT findings were as follows: all of the 8 cases showed unilateral or multilocular expansive bone destruction area with internal bone septum. The density of soft tissue mass was uneven and the plaque low density area was found in all cases. One case located in the middle fossa of the skull had a large extent of bone destruction and had invasiveness to the surrounding tissue. MRI findings showed that the main lesion presented as isobaric T1 and T2 signal intensity, and the lesions contained a number of cystic parts with varying sizes. The signal intensity was not uniform. In 5 cases the liquid-liquid level could be seen in the lesion capsule, and in 8 cases the hypointensity boundary could be seen at the edge of the lesion. The peak signal intensity (SI_ (peak) was 1080, peak time (T _ (peak) was the 9th phase, and the maximum ascending slope (MSI) was 0.81) in one case of TIC located in the middle cranial fossa. Conclusion ABC of skull has typical imaging signs.
【作者单位】：青岛大学附属医院放射科;
【分类号】：R743;R816.1;R445.2

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