cavernoma
noun [ C ] medical specialized uk/kæv.əˈnəʊ.mə/ us/ˌkæv.ɚˈnoʊ.mə/ (also cavernous angioma)
海绵状（血管）瘤
a group of abnormal blood vessels in the brain or spinal cord that may cause seizures (= sudden attacks of uncontrollable movements ) or other brain problems