Patterns of recurrence in the basal and non-basal subtypes of triple-negative breast cancers

Breast Cancer Res Treat. 2009 Nov;118(1):131-7. doi: 10.1007/s10549-008-0295-8. Epub 2009 Feb 3.

Abstract

Traditional prognostic markers for breast cancer include estrogen receptor (ER), progesterone receptor (ER) and HER2/neu. Negative staining for these three markers defines the 'triple-negative' phenotype. By adding markers for cytokeratin 5/6 and EGFR, triple-negative breast cancers can be divided into 'basal-like' and 'normal-like' subgroups. We conducted immuno-staining on a panel of 958 patients with breast cancer, using all five markers and we followed the patients for distal recurrence and death. We compared rates of distal recurrence in the basal-like and normal-like subgroups with that of women with ER-positive breast cancer. Only 16 of 958 women had normal-like breast cancers. These cancers resembled basal-like cancers in that they had a high proliferative index, but the women with normal-like breast cancers resembled ER-positive women in terms of distant recurrence. The addition of CK5/6 and EGFR to the standard panel (ER/PR/HER2/neu) defines a small subgroup of women with normal-like breast cancer. The prognosis of these women may be superior to that of basal-like breast cancers but firm conclusions cannot be made.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Breast Neoplasms / chemistry
  • Breast Neoplasms / mortality
  • Breast Neoplasms / pathology*
  • Carcinoma, Ductal, Breast / chemistry
  • Carcinoma, Ductal, Breast / mortality
  • Carcinoma, Ductal, Breast / pathology
  • Carcinoma, Ductal, Breast / secondary*
  • Carcinoma, Lobular / chemistry
  • Carcinoma, Lobular / mortality
  • Carcinoma, Lobular / pathology
  • Carcinoma, Lobular / secondary*
  • Cell Division
  • Disease-Free Survival
  • ErbB Receptors / analysis
  • Female
  • Follow-Up Studies
  • Humans
  • Kaplan-Meier Estimate
  • Keratin-5 / analysis
  • Keratin-6 / analysis
  • Ki-67 Antigen / analysis
  • Middle Aged
  • Neoplasm Metastasis
  • Neoplasm Proteins / analysis*
  • Prognosis
  • Proportional Hazards Models
  • Receptor, ErbB-2 / analysis
  • Receptors, Estrogen / analysis
  • Receptors, Progesterone / analysis
  • Young Adult

Substances

  • Keratin-5
  • Keratin-6
  • Ki-67 Antigen
  • Neoplasm Proteins
  • Receptors, Estrogen
  • Receptors, Progesterone
  • EGFR protein, human
  • ERBB2 protein, human
  • ErbB Receptors
  • Receptor, ErbB-2