cancerous

adjectives

relating to or affected with cancer
"a cancerous growth"
is derived from
is similar to
dangerous to health; characterized by progressive and uncontrolled growth (especially of a tumor)
like a cancer; an evil that grows and spreads
"remorse was cancerous within him"; "pornography is cancerous to the moral development of our children"
is similar to
evil or harmful in nature or influence
"prompted by malign motives"; "believed in witches and malign spirits"; "gave him a malign look"; "a malign lesion"