title: [Multiple primary breast cancer].
abstract: Primary multiplicity (PM) of mammary carcinoma is found in 669 (39%) cases of 1690 invasive tumors. PM is more typical for invasive ductal carcinoma with predominance of the intraductal component (67%), Paget cancer (61%), invasive lobular carcinoma (55.5%) and tubular carcinoma (52%). Invasive PM develops in the presence of the corresponding background with areas of grave dysplasia and intraepithelial carcinoma. True PM does not influence the disease prognosis.
authors.affiliation: P. A. Herzen Moscow Research Oncological Institute, Moscow.
authors.forename: N N
authors.initials: NN
authors.lastname: Volchenko
mesh_terms: D001940:Breast / Q000473:pathology; D001943:Breast Neoplasms / Q000473:pathology* / Q000556:secondary; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local / Q000473:pathology; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000556:secondary; D016609:Neoplasms, Second Primary / Q000473:pathology; D011379:Prognosis; D012307:Risk Factors