Patterns of local and distant disease relapse in patients with breast cancer treated with primary chemotherapy: do patients with a complete pathological response differ from those with residual tumour in the breast?

Breast Cancer Res Treat. 2005 Sep;93(2):151-8. doi: 10.1007/s10549-005-4615-y.

Abstract

This study aimed to evaluate patterns of local and distant disease recurrence in patients having primary chemotherapy and compared patterns of relapse in patients with a complete pathological response with those who had residual breast disease. This is an observational study using a sequential series of patients treated with primary chemotherapy. They were followed up for a minimum of 5 years. All data was collected prospectively. Three hundred forty-one consecutive patients with breast cancer were treated with up to eight cycles of doxorubicin-based chemotherapy. Clinical and pathological response rates were evaluated and patients were followed up for disease recurrence (local and distant) and overall survival. Fifty-two patients (16.5%) had a complete pathological response to chemotherapy. Distant disease recurrence occurred in nine patients (17.3%) but no local recurrence was observed. In patients not having a complete pathological response, 86 patients (32.6%) subsequently developed metastases. Local recurrence of disease occurred in 12 (4.5%). There was a statistically significant difference in overall survival between patients whose tumours had a complete pathological response compared with patients who had residual disease in the breast following chemotherapy (88% versus 70% at 5 years, p = 0.036). Following primary chemotherapy, about 84% of patients had residual disease in the breast. Surgery is necessary to ensure complete removal of residual tumour and excellent rates of local control are achievable. A complete pathological response is associated with fewer local and distant recurrences as well as improved survival although there are no differences in time to development of metastatic relapse.

MeSH terms

  • Adult
  • Aged
  • Antibiotics, Antineoplastic / therapeutic use
  • Breast Neoplasms / drug therapy*
  • Breast Neoplasms / surgery
  • Combined Modality Therapy
  • Doxorubicin / therapeutic use
  • Female
  • Humans
  • Lymphatic Metastasis
  • Middle Aged
  • Neoplasm Recurrence, Local
  • Neoplasm Staging
  • Neoplasm, Residual / drug therapy
  • Neoplasm, Residual / surgery
  • Prognosis
  • Prospective Studies
  • Survival Analysis
  • Treatment Outcome

Substances

  • Antibiotics, Antineoplastic
  • Doxorubicin