I had radiation and lumpectomy for IDC a year ago. My follow up visits and blood work have been clear. A few weeks after a 3D mammogram that was clear with no density I noticed the nipple in that breast flattened. I am scheduled for an MRI. Dr felt no mass during exam and said there was some tissue deficiency. I am so scared and so confused. How could this happen. Radiation was supposed to kill the microscopic tumors and 3D mammograms are supposed to catch abnormalities. I am just sick about this.