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Definition. Breast calcifications are calcium deposits within breast tissue. They appear as white spots or flecks on a mammogram and are usually so small that you can't feel them. Breast calcifications are common on mammograms and they're especially prevalent after menopause.n a mammogram, breast calcifications can appear as macrocalcifications or microcalcifications. 1  Macrocalcifications. 2  These show up as large white dots or dashes. 3  They're almost always noncancerous and require no further testing or follow-up.
Breast calcifications are small deposits of calcium in the breast. There are two types, macrocalcifications and microcalcifications. In most cases, breast calcifications are harmless. They are usually picked up during a mammogram (breast x-ray). Macrocalcifications are found in about half of all women over the age of 50. They are a natural result of breast ageing.