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Chinese Journal of Clinicians(Electronic Edition) ›› 2022, Vol. 16 ›› Issue (06): 469-473. doi: 10.3877/cma.j.issn.1674-0785.2022.06.002

• Clinical Research • Previous Articles     Next Articles

Feasibility of short-term filgrastim in supporting dose-dense neoadjuvant chemotherapy for primary breast cancer

Jingyi Zhao1, Yingjian He1, Jinfeng Li1, Zhaoqing Fan1, Tianfeng Wang1, Yang Yang1, Xinguang Wang1, Xue Chen1, Yangtao Ou1,()   

  1. 1. Breast Cancer Prevention and Treatment Center, Peking University Cancer Hospital and Beijing Institute of Cancer Prevention and Treatment, Beijing 100142, China
  • Received:2022-05-12 Online:2022-06-15 Published:2022-08-09
  • Contact: Yangtao Ou

Abstract:

Objective

To retrospectively assess the efficacy and safety of short-term filgrastim in supporting dose-dense neoadjuvant chemotherapy (ddEC) for primary breast cancer based on a single database, in order to examine the feasibility of this method.

Methods

Data of patients who received dose-dense neoadjuvant chemotherapy with support of short-term filgrastim at Peking University Cancer Hospital Breast Cancer Prevention and Treatment Center from July 2015 to June 2018 were retrospectively collected. All of these patients were planned to receive four cycles of ddEC (Epirubicin 100 mg/m2 and cyclophosphamide 600 mg/m2) with the usage of rhG-CSF as follows: Filgrastim 200-300 μg/d on days 4, 6, 8, and 10. The relative dose intensity (RDI) was calculated based on chemotherapy delay and the number of dosage reductions, as well as febrile neutropenia (FN).

Results

A total of 301 patients were enrolled in this study. Chemotherapy induced neutropenia related chemotherapy delay occurred in 15 patients (5.0%; 95% confidence interval [CI]: 2.5%~7.5%), 289 patients achieved an RDI≥85% (96%; 95CI: 93.8%~98.2%), and FN occurred in 14 patients (4.7%; 95%CI: 2.3%~7.1%).

Conclusion

According to this study, short-term filgrastim is feasible in supporting four cycles of neoadjuvant chemotherapy for primary breast cancer.

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