Low proliferative rate of invasive node-negative breast cancer predicts for a favorable outcome: a prospective evaluation of 669 patients.

S. Jones, G. Clark, S. Koleszar, G. Ethington, R. Mennel, S. Paulson, B. Brooks, R. Kerr, C. Denham, M. Savin, C. White, J. Blum, R. Kirby, M. Stone, J. Pippen, L. Kitchens, T. George, B. Cooper, G. Peters, S. KnoxM. Grant, H. Cheek, R. Jones, J. Kuhn, Z. Lieberman, D. Savino, C. Rietz

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Abstract

This study was designed to compare outcome in terms of disease-free survival (DFS) in women with histologically negative axillary lymph nodes and documented low proliferative rate cancer to other well-defined prognostic factors including type of adjuvant treatment. Between 1988 and 1998, we studied 669 patients with invasive node-negative breast cancer up to 5 cm in size and low proliferative rate measured by flow cytometry to determine S-phase fraction (SPF) or by histochemistry (Ki67/MIB1). At a median follow-up of 53 months, 5-year DFS for the entire group was 94% and did not differ significantly by type of systemic adjuvant treatment: none (133 patients, 95% DFS), tamoxifen (441 patients, 94% DFS), or chemotherapy with doxorubicin and cyclophosphamide (95 patients, 92% DFS). In a multivariate prognostic factor analysis, only tumor size was significant; 5-year DFS was 96% for T1N0 cancer versus 89% for T2N0 cancer (P = 0.01). We have prospectively confirmed that a low rate of proliferation as measured by SPF or MIB1 determination confers an excellent prognosis in invasive node-negative breast cancer up to 5 cm in size, regardless of adjuvant treatment.

Original languageEnglish (US)
Pages (from-to)310-314; discussion 315-317
JournalClinical breast cancer
Volume1
Issue number4
StatePublished - Jan 2001

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ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Jones, S., Clark, G., Koleszar, S., Ethington, G., Mennel, R., Paulson, S., Brooks, B., Kerr, R., Denham, C., Savin, M., White, C., Blum, J., Kirby, R., Stone, M., Pippen, J., Kitchens, L., George, T., Cooper, B., Peters, G., ... Rietz, C. (2001). Low proliferative rate of invasive node-negative breast cancer predicts for a favorable outcome: a prospective evaluation of 669 patients. Clinical breast cancer, 1(4), 310-314; discussion 315-317.