A cancer is a malignant tumour.

癌是一种恶性瘤。

《新英汉大辞典》

His experiments were the first clear demonstration of the role of a virus in one type of malignant tumor.

他的实验首次清晰地证明了病毒在一种恶性肿瘤中的作用。

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As observed with the chickens, the filterable agent, a virus, could seldom be recovered from the malignant tumor which it had induced.

在鸡身上观察到，一种叫滤过性病原体的病毒，很少能从它诱发的恶性肿瘤中恢复过来。

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Malignant melanoma begins in body cells that produce a brown color.

VOA: special.2010.07.06

It was a gene that was causing a cell to be malignant and to divide without control, for example.

例如,一个会使细胞恶化,并不受控制地无限分裂的基因

耶鲁公开课 - 生物医学工程探索课程节选

He beat bowel cancer in 1992, a malignant melanoma in 1995 and a tumour in his right lung and a brain tumour, both in 2006.

BBC: Legend Sir Bobby Robson, 76, dies

Kennedy, the third-longest serving U.S. senator in history, was diagnosed with a malignant brain tumor in May after suffering a seizure at his family home on Cape Cod, Massachusetts.

CNN: Democrats to kick off convention with 'One Nation' theme

When he learned his daughter, Alison, had a malignant brain tumor, nothing else mattered to him but to find a cure for her.

CNN: [Joseph Sacerdote]