恶性程度英语怎么说

恶性程度英语翻译为"malignancy"，来源于拉丁语的"malignus"，意思是邪恶的、恶意的。
例句：
The doctor said the tumor's malignancy made it inoperable.
医生说，肿瘤的恶性程度使其不可手术。
The malignancy of the cancer had spread to her liver and lungs.
癌症的恶性程度已蔓延到她的肝脏和肺部。