An intraductal papilloma is a benign, or noncancerous, breast tumour that forms in a milk duct and is made of gland and fibrous tissue as well as blood vessels. These generally appear as lumps after breast examination and may cause nipple discharge or bleeding. Intraductal papilloma most commonly occur in women between ages 35 and 55. Central/solitary papillomas are generally benign while multiple papillomas, have been associated with a slightly higher risk of breast cancer.