This 47-year-old woman diagnosed with metastatic carcinoma of the breast was also found to have severe hypercalcemia. She developed metastatic calcification which was most prominent in the kidneys and lungs. The patient was provided hospice care and died of respiratory failure.  In addition to the metastatic breast cancer, important gross findings at autopsy included lungs that were gritty and firm and which weighed 1330 grams. The patient's parathyroid glands were normal.