What are calcifications?

A calcification is a deposit of the mineral calcium in the breast tissue. Calcifications appear as small white spots on a mammogram. There are two types:

Macrocalcifications are large calcium deposits often caused by aging. These are usually not a sign of cancer. Microcalcifications are tiny specks of calcium that may be found in an area of rapidly dividing cells.

If calcifications are grouped together in a certain way, it may be a sign of cancer.

Depending on how many calcium specks you have, how big they are, and what they look like, your doctor may suggest that you have:

A different type of mammogram that allows the radiologist to have a closer look at the area Another screening mammogram, usually within 6 months Other tests such as ultrasound or biopsy

This answer is based on source information from the National Cancer Institute.