malignancy
noun medical specialized uk/məˈlɪɡ.nən.si/ us/məˈlɪɡ.nən.si/
[ U ]恶性;恶意
the state of being malignant
The malignancy of these tumours makes them difficult to treat. 这些肿瘤为恶性，很难治疗。
[ C ]恶性生长，恶性肿瘤
a growth that is likely to get worse and lead to death
Tests revealed a malignancy that had to be removed. 检查发现了一个恶性肿瘤，必须切除。