noun
malignant tumor; cancer
Medical term for a cancerous growth. In everyday conversation, 癌 (がん) is more common, but 悪性腫瘍 is used in formal or clinical contexts.
See also: 癌 (がん)
検査の結果、悪性腫瘍が見つかった。
The examination revealed a malignant tumor.
Surgery and anticancer drugs are used to treat malignant tumors.