meningioma
noun [ C ] medical specialized uk/menˌɪn.dʒiˈəʊ.mə/ us/məˌnɪn.dʒiˈoʊ.mə/
脑脊膜瘤
a brain tumour that grows from the meninges (= the three layers of tissue that surround the brain and spinal cord)
As meningiomas grow, they press on the surrounding parts of the brain. 脑脊膜瘤变大时，会压迫周围的脑组织。