影像学表现类似侵袭性肿瘤，增强扫描可见强化，占位效应明显。
Imaging features resemble an aggressive mass lesion with enhancement and mass effect.
由于病变占位效应的影响，病变周围的功能活动区常发生变形或移位。
The mass effect of intracranial lesions may lead to deformation or displacement of the near functional areas.
目的：探讨CT或MRI显示占位效应及强化不明显胶质瘤的有效诊治方法。
Objective: To investigate the effective diagnosis and treatment methods for the glioma with absence of significant enhancement and mass effect on CT or MRI.
星型细胞瘤ct像上显示局部占位效应明显，在T2WI像上显示脑回结构消失。
The astrocytoma had obvious local occupying effect on the ct and the structure of gyrus disappearanced on the T2WI.
有的外科医生认为除非具有明显的占位效应，导致症状，否则受阻侧脑室分流就可以了。
Some surgeons believe that shunting of the obstructed lateral ventricle is sufficient unless local mass effect causes symptoms.
病灶为大片低密度影内可见散在、分布不均匀的斑点或斑片状高密度影，有程度不一的占位效应。
Focuses had sign of the patch shaped low-density areas and high-density plot area scattered in them. They all had mass effect in different degree.
结论脑干海绵状血管瘤表现为进行性神经功能缺失、具有占位效应、接近脑干表面者可考虑手术治疗；
Conclusion When the patients with brainstem cavernous malformation exhibited progressive neural function deficits and mass effect, it should be considered as good candidates for surgical therapy.
原始图像可发现小的和巨大动脉瘤，显示瘤腔、瘤壁、瘤体、占位效应准确，其瘤颈、瘤腔的信号多高于MRA；
The small or giant aneurysm, aneurysmal sac, wall, body, mass effect can be showed by the source images, its signals of aneurysmal neck and sac was higher than MRA.
原始图像可发现小的和巨大动脉瘤，显示瘤腔、瘤壁、瘤体、占位效应准确，其瘤颈、瘤腔的信号多高于MRA；
The small or giant aneurysm, aneurysmal sac, wall, body, mass effect can be showed by the source images, its signals of aneurysmal neck and sac was higher than MRA.
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