The definition of benign is not cancerous or mild. Someone who goes to the doctor to have a growth evaluated would be relieved to hear that their growth, or lesion, is benign, not a skin cancer. The following are lesions that may look concerning but are actually benign:
Sources:
"Benign." Dorland's Illustrated Medical Dictionary, 31st Ed. Philadelphia: Saunders, 2007. 211.
"Benign." Stedman's Medical Dictionary, 28th Ed. Baltimore: Lippincott Williams & Wilkins, 2006. 213.

