Calcinosis universalis and breast cancer: A distinctive association

Calcinosis universalis (CU) is characterised by diffuse deposition of insoluble calcium salt in the skin, subcutaneous tissue or organs. Calcium deposits in the breast may be associated with an increased risk for developing breast cancer. We present a case of a 65-year-old woman diagnosed with CU secondary to undifferentiated connective tissue disease. She developed progressive calcification of her skin, which did not improve with oral medications aimed at reducing the calcification. Investigations to look for possible causes of calcification were all unremarkable. During follow-up, calcification was also found in both her breasts. Initial mammography was reported as fibroadenoma. However, 3 years later, she returned with metastatic breast cancer which presented with a massive pleural effusion of the right lung. Calcinosis universalis should now be considered as a risk factor for breast cancer.