影像所见
CT
- 累及桥脑背侧和小脑中脚的团块状低密度区,对第四脑室产生占位效应
- 双侧蝶窦和后组筛窦黏膜增厚和积液
MRI
- 累及桥脑、中脑(包括大脑脚)、左侧偏心延髓和左侧大于右侧小脑中脚的团块状T2/FLAIR信号增高区域
- 桥脑腹侧轻度弥散受限
- 肿块突入桥前池并至少部分包绕基底动脉
- 对第四脑室产生占位效应,无明显脑积水
- 无相应强化
带注释的图像和插图
Homogeneous FLAIR hyperintense mass involving the entire pons and extending into the midbrain and medulla, which is a classic imaging appearance for a diffuse midline glioma.
Area of mild restricted diffusion in the ventral pons, which demonstrated elevated cerebral blood volume on perfusion analysis (red arrows).
诊断
弥漫性中线胶质瘤
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