Changes

==Diagnosis==

==Diagnosis==

In the modern era, the majority of breast cancers are diagnosed as a result of an abnormal mammogram and subsequent biopsy {{fact}} Up to 20 percent of new breast cancers are not detected or visible on a mammogram. MRI is becoming an important diagnostic test in certain situations.

In the modern era, the majority of breast cancers are diagnosed as a result of an abnormal mammogram and subsequent biopsy {{fact}} Up to 20 percent of new breast cancers are not detected or visible on a mammogram. MRI is becoming an important diagnostic test in certain situations.<ref>Kriege, M. Efficacy "Of MRI and Mammography for Breast-Cancer Screening in Women With aFamilial or Genetic Predisposition." New England Journal of Medicine. July 29, 2004, Vol. 351, No. 5, pp. 427-437.</ref>

==Staging==  

==Staging==