PurposeDespite widespread use of fluorouracil, epirubicin, cyclophosphamide,
docetaxel (FEC-D) chemotherapy in breast cancer, the optimal strategy for
primary febrile neutropenia (FN) prophylaxis remains unknown. A systematic
review was therefore performed.MethodsEmbase, Ovid MEDLINE, PubMed, Cochrane Database of Systematic Reviews,
Cochrane Register of Controlled Trials, and conference proceedings were
searched from 1946 to April 2016 for trials that reported the effectiveness
of primary FN prophylaxis with FEC-D chemotherapy. Outcome measures were
incidence of FN; treatment-related hospitalizations; chemotherapy dose
delays, reductions, and discontinuations; and adverse events from
prophylaxis.ResultsOf 2,205 identified citations, eight studies (n = 1,250) met our eligibility
criteria. Three additional studies (n = 293) were identified from a prior
systematic review. Three randomized controlled trials (n =
576), one phase IV single-arm trial (n = 69), one prospective observational
study (n = 37), and six retrospective studies (n = 861) were identified.
Agents investigated were pegfilgrastim (n = 108), filgrastim (n = 1,119),
and ciprofloxacin (n = 89). The heterogeneity of studies meant that a
narrative synthesis of results was performed. Median FN rates for patients
who received FEC-D with and without primary prophylaxis were 10.1%
(interquartile range [IQR], 3.9% to 22.6%) and 23.9% (IQR, 9.2% to 27.3%),
respectively. In the absence of primary prophylaxis, FN was more common
during docetaxel than during FEC. Data from six studies showed a median rate
of dose reductions and delays of 6.1% (IQR, 3.1% to 14.3%) and 19.3% (IQR,
10.5% to 32.8%), respectively, that occurred as a consequence of FN.
Toxicity from prophylaxis itself was rarely reported.ConclusionPrimary FN prophylaxis is effective in patients who receive FEC-D
chemotherapy. The paucity of prospective data makes optimal recommendations
about the choice and timing of prophylaxis challenging.