Definition of Malignant
causing an extremely serious, possibly even fatal, issue
Examples of Malignant in a sentence
When the doctors discovered a malignant tumor in Samโs brain, they told him he only had six months to live.
After the bombing, people had to wear masks to avoid inhaling the malignant fumes of the chemical agents.
Kim is having a biopsy today to see if the lump in her breast is malignant.
Crystal cried when she learned the tumor was malignant.
Hopefully the intravenous treatment will destroy the malignant cells so you can live a long and healthy life.
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