Adjuvant Docetaxel and Cyclophosphamide (DC) with prophylactic granulocyte colony-stimulating factor (G-CSF) on days 8 &12 in breast cancer patients: a retrospective analysis

PLoS One. 2014 Oct 15;9(10):e107273. doi: 10.1371/journal.pone.0107273. eCollection 2014.

Abstract

Purpose: Four cycles of docetaxel/cyclophosphamide (DC) resulted in superior survival than doxorubicin/cyclophosphamide in the treatment of early breast cancer. The original study reported a 5% incidence of febrile neutropenia (FN) recommending prophylactic antibiotics with no granulocyte colony-stimulating factor (G-CSF) support. The worldwide adoption of this protocol yielded several reports on substantially higher rates of FN events. We explored the use of growth factor (GF) support on days 8 and 12 of the cycle with the original DC protocol.

Methods: Our study included all consecutive patients with stages I-II breast cancer who were treated with the DC protocol at the Institute of Oncology, Davidoff Center (Rabin Medical Center, Petah Tikva, Israel) from April, 2007 to March, 2012. Patient, tumor characteristics, and toxicity were reported.

Results: In total, 123 patients received the DC regimen. Median age was 60 years, (range, 25-81 years). Thirty-three patients (26.8%) were aged 65 years and older. Most of the women (87%) adhered to the planned G-CSF protocol (days 8 &12). 96% of the patients completed the 4 planned cycles of chemotherapy. Six patients (5%) had dose reductions, 6 (5%) had treatment delays due to non-medical reasons. Thirteen patients (10.6%) experienced at least one event of FN (3 patients had 2 events), all requiring hospitalization. Eight patients (6.5%) required additional support with G-CSF after the first chemotherapy cycle, 7 because of FN and one due to neutropenia and diarrhea.

In conclusion: Primary prophylactic G-CSF support on days 8 and 12 of the cycle provides a tolerable option to deliver the DC protocol. Our results are in line with other retrospective protocols using longer schedules of GF support.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Anti-Bacterial Agents / administration & dosage
  • Antineoplastic Combined Chemotherapy Protocols / administration & dosage
  • Breast Neoplasms / drug therapy*
  • Breast Neoplasms / pathology
  • Cyclophosphamide / administration & dosage*
  • Docetaxel
  • Female
  • Granulocyte Colony-Stimulating Factor / administration & dosage*
  • Humans
  • Israel
  • Middle Aged
  • Retrospective Studies
  • Taxoids / administration & dosage*

Substances

  • Anti-Bacterial Agents
  • Taxoids
  • Granulocyte Colony-Stimulating Factor
  • Docetaxel
  • Cyclophosphamide

Grant support

The authors have no support or funding to report.