Association of HER-2/neu overexpression with the number of involved axillary lymph nodes in hormone receptor positive breast cancer patients


Fusun T., Semsi A., Cem U., Mevlut T., Zafer K., Kazim U. , ...More

EXPERIMENTAL ONCOLOGY, vol.27, no.2, pp.145-149, 2005 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 2
  • Publication Date: 2005
  • Title of Journal : EXPERIMENTAL ONCOLOGY
  • Page Numbers: pp.145-149

Abstract

Aim: To evaluate the prognostic significance of HER-2/neu overexpression in hormone receptor and axillary lymph node positive breast cancer patients treated in a single institution. Methods: Paraffin-embedded primary breast cancers from 40 patients with invasive ductal carcinoma were studied immunohistochemically. HER-2/neu staining was classified as negative (0, 1+), weak/moderate positive (2+), or moderate/strong positive (3+) and was assessed for effectiveness as a predictor of outcome in univariate and Cox model multivariate analyses. Results: 20% of patients were positive for HER-2/neu. Significant associations were observed between HER-2/neu and increasing number of involved nodes (p = 0.014), p53 positivity (p = 0.039), the presence of vascular invasion (p = 0.029) and metastases (p = 0.01). Multivariate analysis demonstrated that HER-2/neu overexpression (p = 0.016) and age (p = 0.005) were independent predictors for disease-free survival (DFS) where the number of involved nodes (p = 0.032) was shown to be independent predictor for overall survival. In the HER-2/neu positively stained tumors, significant number of patients developed distant metastases than the patients with HER-2/neu negatively stained tumors (87.5% vs 34.4%, p = 0.01). Conclusion: For node positive patients, HER-2/neu overexpression was a significant predictor of DFS.