Can there be any long-term effect of an areola reduction surgery? (donut/benelli) im not thinking about the ones usually listed (like loss of sensation), but like malignant transformation in the scarring area, etc?

Surgery that involves cutting and sewing without leaving a foreign body behind, takes advantage of the body's natural healing properties that have evolved over millennia and carry no inherent malignancy risk. but don't dismiss the magnitude of the complications caused by infection or interruptions of nerve and blood supply. Donuts Benelli Nipple Surgery can be complicated by necrosis and infection

scarring after surgery is common but it does not cause cancer. So you can relax and not worry and have the areola surgery if desired.