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Outcomes of Rural Men with Breast Cancer: A Multicenter Population Based Retrospective Cohort Study.

Lucas A B Fisher1, Osama Ahmed1,2, Haji Ibraheem Chalchal1,3

  • 1Division of Oncology, College of Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada.

Cancers
|April 13, 2023
PubMed
Summary

This study found that while rural residence did not significantly impact male breast cancer outcomes, rural men experienced numerically worse survival. Poor performance status and node-positive disease were linked to reduced disease-free survival.

Keywords:
agebreast cancerbreast malignancycohortmale breast cancermenperformance statusrural residencesurvivalsystemic therapy

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Area of Science:

  • Oncology
  • Epidemiology
  • Public Health

Background:

  • Male breast cancer is a rare condition.
  • Understanding factors influencing male breast cancer outcomes is crucial for targeted interventions.
  • This study investigates survival rates in relation to residence and other variables in male breast cancer patients.

Purpose of the Study:

  • To determine the outcomes of male breast cancer in Saskatchewan, Canada.
  • To analyze the correlation between survival and clinicopathological factors, including residence.
  • To identify predictors of disease-free and overall survival in men diagnosed with breast cancer.

Main Methods:

  • Retrospective cohort study of male breast cancer patients in Saskatchewan (2000-2019).
  • Cox proportional multivariable regression analyses were used to assess survival correlations.
  • Clinicopathological and contextual factors were evaluated.

Main Results:

  • 108 male breast cancer patients identified; median age 69 years; 61% rural residents.
  • Hormone receptor-positive breast cancer was prevalent (98%).
  • No significant difference in disease-free survival (DFS) or overall survival (OS) between urban and rural patients, though rural men had numerically inferior survival.
  • Factors associated with inferior DFS: performance status ≥ 2, lack of adjuvant systemic therapy, node-positive disease.
  • Factors associated with inferior OS: stage IV disease, performance status ≥ 2, age ≥ 65 years.

Conclusions:

  • Residence was not a significant predictor of male breast cancer outcomes in this cohort.
  • Rural men showed a trend towards numerically inferior survival.
  • Poor performance status, node-positive disease, and absence of adjuvant systemic therapy were significant predictors of poorer DFS.
  • Advanced stage (IV), poor performance status, and older age (≥65) predicted poorer OS.