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Benign

(Science: oncology) Something that does not metastasise and treatment or removal is curative.

Compare: malignant.

Origin: L. Benignus Not dangerous to health; not recurrent or progressive (especially of a tumor).Pleasant and beneficial in nature or influence; a benign smile; the benign sky; the benign influence of pure air.Non-malignant, a benign tumour is harmless unlike a malignant tumour.