“恶性的”用英语怎么说？

90%的肿块都不是恶性的。Nine out of ten lumps are not cancerous.这个瘤不是恶性的.The growth is not malignant.破坏性和恶性的绒毛膜上皮癌往往是葡萄胎所引起.The destructive and malignant neoplasms of chorionic epithelium often arise from hydatidiform moles....