Histopathologic types of breast cancer, with relative incidences and prognoses.<unk> " is at right.<unk>  is identified in 0.5-1.5% of benign breast biopsies. These biopsies are often done in response to suspicious mammographic findings, as discussed in the Diagnosis section of this article.<unk>  is identified in 1.8-2.5% of all breast biopsies (including those that show histologic evidence of other Lobular or Ductal Neoplasia. The incidence of<unk>  in women without prior history of breast neoplasia has increased from 0.90 per 100,000 persons in 1980 to 3.19 per 100,000 persons in 1998 – but this is likely due to the increased frequency of mammography as a screening tool. This is supported by the fact that the magnitude of increase in frequency of<unk>  was greatest among women over 50 years of age (the group most likely to participate in routine mammographic screening).
Lobular carcinoma in situ
Ductal carcinoma in situ
Sister Mary Joseph nodule
Invasive lobular carcinoma
Invasive carcinoma of no special type
Lymphoepithelioma-like carcinoma
Focal nodular hyperplasia
Atypical ductal hyperplasia