What causes benign calcifications?
They are produced by secretions of the duct system of the breast- rarely by necrosis(waste product of dead cells). The breast normally secretes all the time, even when the woman is not lactating or pregnant and even if she’s never been pregnant or never breast fed. Some of the proteins are like milk proteins but it’s not milk. But some of these proteins, as they become denatured (decomposed) in a duct, will pick up calcium salts — will leach out calcium salts from the blood and these are called calcifications.