影像所见
CT
- 右侧颞叶内侧低密度肿块,向下经小脑幕切迹膨出
- 无对应钙化
MRI
- 右侧颞叶内侧(累及海马和海马旁回)分叶状T1低信号、T2高信号肿块,大小约4.5 x 4.3 x 3 cm
- 肿块向下经小脑幕切迹膨出并接触小脑上缘
- FLAIR上内部信号抑制不完全
- 无对应弥散受限或强化
- 无周围脑实质水肿
- 相关局部占位效应但无脑积水征象
- 1.4 cm松果体囊肿
带注释的图像和插图
Solid mass in the medial right temporal lobe (red arrow), which bulges inferiorly through the tentorial notch (yellow arrow). Note that there is partial internal signal suppression on FLAIR compared to T2. Incidental pineal cyst (blue arrow).
诊断
IDH突变型星形细胞瘤
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