title: Breast parenchymal patterns: prevalent and incident carcinomas.
abstract: Breast parenchymal patterns can be divided into four groups: N1, P1, P2 and DY. Although there is evidence that the P2-DY group favors the development of cancer, the risk classification changes when one considers prevalent vs. incident breast cancers. In a purely incident series, a gradual diminution will be seen in the number of N1-P1 cancer cases and a corresponding rise in cancer patients from the P2-DY group.
mesh_terms: D001940:Breast / Q000033:anatomy & histology*; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000473:pathology; D005260:Female; D006801:Humans; D009362:Neoplasm Metastasis; D011859:Radiography; D012306:Risk