Clinical Significance of Lymph Node Ratio in Locally Advanced Breast Cancer Molecular Subtypes


Demircioglu F., Demirci U., Kilic D., ÖZKAN S. , Karahacioglu F.

ONKOLOGIE, vol.36, no.11, pp.637-640, 2013 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 11
  • Publication Date: 2013
  • Doi Number: 10.1159/000355663
  • Title of Journal : ONKOLOGIE
  • Page Numbers: pp.637-640

Abstract

Background: The ratio of metastatic to dissected lymph nodes (lymph node ratio; LNR) is a sensitive and superior prognostic factor for lymph node evaluation, but its relationship to cancer subtypes is unclear. Patients and Methods: Data from 469 patients with axillary lymph node metastasis out of 640 early breast cancer cases were retrospectively analyzed. They were classified into 4 molecular subtypes; lumina! A, luminal B HER2(+), HER2 overexpression, basal-like. LNRs were compared between groups and with other prognostic factors. Results: The distribution of LNRs was 35.2% in luminal A, 43.2% in luminal B HER2(+), 46.9% in HER2 overexpression, and 39.1% in basal-like. A significant difference was found between lumina! A and HER2 overexpression subtypes (p = 0.023). LNR was significantly correlated with tumor size and lymphovascular invasion, but not with other prognostic factors including menopausal status, laterality, grade, and perineural invasion. An LNR of 29.8% was defined as the cut-off value, and significant differences in survival rates were identified accordingly between basal-like and both luminal A (p = 0.003) and luminal B HER2(+) (p = 0.04). Conclusion: The LNR differs between some molecular subtypes of breast cancer, and it correlates with certain prognostic factors and survival. These data support using the LNR to assess breast cancer patients.