3. How a Diagnostic Mammogram Works.
Diagnostic mammograms take longer than screening mammograms because more x-rays are taken to obtain views of the breast from different angles. Usually, the patient is no longer seeking precautionary measures, but looking to know more about a lump, sign, or symptom that already has been found. Signs of breast cancer may include pain, skin thickening, nipple discharge, and a change in breast size or shape. However, these signs also can be non-cancerous, and diagnostic mammograms can help doctors make accurate diagnoses.