A screening mammogram is performed on women without symptoms as a “checkup” once per year beginning at age 40. A minimum of four X-ray pictures, two of each breast, are taken on a special X-ray machine used for mammograms only.
Mammograms are called diagnostic when they are being done for one of the following reasons:
A new breast lump, pain, or nipple discharge was noticed by you or your doctor. Your recent screening mammogram showed something that requires more X-ray pictures and possibly a sonogram. Your last mammogram or sonogram showed something that is being closely followed.