劍橋詞典a brain tumour that grows from the meninges (= the three layers of tissue that surround the brain and spinal cord ) 腦脊膜瘤 As meningiomas grow , they press on the surrounding parts of the brain . 腦脊膜瘤變大時，會壓迫周圍的腦組織。 返回 meningioma