evidence: Breast calcifications are calcium deposits that develop in breast tissue. They’re common and often show up on a routine mammogram. While they’re usually benign (noncancerous), breast calcifications can be a sign that you’re at risk for developing breast cancer. Routine mammograms can detect precancerous changes so that treatment can begin early. [...] You can’t prevent breast calcifications, but early detection through a mammogram is important in identifying any possible cancer that could develop. [...] The good news is that once a mammogram detects calcifications, they become part of your medical record. The radiologist who reviews future X-rays can note any differences that may indicate precancerous changes so that you can receive further testing and treatment as needed. Early detection can prevent breast cancer.