malignant

And when doctors like Dr Baksheiev do get into those areas to perform examinations, they are finding a higher than average incidence of malignant tumours.

Owain James was 34 when he was told three years ago he had a malignant, stage four tumour in his brain.

But mass protest can succeed at proving the fallaciousness of this proposition — that Americans will not bow down, be silenced or broken by this malignant regime that despises democracy.

Doctors suspected a tumour, but Ander says he and Paloma, "one of the smartest people I've ever met", were hopeful at first that it would turn out not to be malignant.

It's what earns his narcissism the modifier "malignant."