Not harmful in effect; specifically referring to tumors or growths that do not invade surrounding tissues or spread to other parts of the body. Benign conditions are generally not life-threatening and have a favorable outcome.
From Latin 'benignus' meaning kind, gentle, or favorable, combining 'bene' (well) and 'genus' (born). The medical usage dates to the 15th century, originally describing mild diseases but later specifically applied to non-cancerous tumors.
Benign literally means 'well-born' or 'kind' - it's like nature's way of giving you a gentle tumor that knows how to mind its own business! Unlike its evil twin malignant, benign growths are the polite houseguests of the medical world - they stay where they're put and don't cause trouble.
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