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[Multiple primary breast cancer].

N N Volchenko1

  • 1P. A. Herzen Moscow Research Oncological Institute, Moscow.

Arkhiv Patologii
|October 16, 1999
PubMed
Summary

Primary multiplicity (PM) of mammary carcinoma occurs in 39% of invasive tumors. True PM, often seen in specific breast cancer types, does not impact patient prognosis.

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Area of Science:

  • Oncology
  • Pathology
  • Breast Cancer Research

Context:

  • Investigating the occurrence and characteristics of primary multiplicity (PM) in mammary carcinoma.
  • Analyzing a cohort of 1690 invasive breast tumors to determine the prevalence of PM.
  • Identifying specific histological subtypes of breast cancer associated with PM.

Purpose:

  • To quantify the incidence of primary multiplicity in invasive mammary carcinoma.
  • To explore the association between PM and various invasive breast cancer subtypes.
  • To evaluate the prognostic significance of true PM in breast cancer patients.

Summary:

  • Primary multiplicity (PM) was identified in 39% (669/1690) of invasive mammary carcinoma cases.
  • PM is frequently observed in invasive ductal carcinoma with intraductal component predominance (67%), Paget cancer (61%), invasive lobular carcinoma (55.5%), and tubular carcinoma (52%).
  • Invasive PM arises in a background of severe dysplasia and intraepithelial carcinoma; however, true PM does not affect disease prognosis.

Impact:

  • Provides crucial data on the prevalence of PM in invasive breast cancer.
  • Highlights specific breast cancer subtypes where PM is more common, aiding diagnostic considerations.
  • Clarifies that true PM is not a negative prognostic indicator, potentially reducing patient anxiety and guiding treatment strategies.

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