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Preoperative or induction chemotherapy with docetaxel, cisplatin, plus 5‐fluorouracil (DCF) is a promising regimen for advanced esophageal cancer. However, the DCF regimen is associated with a high risk of severe neutropenia or febrile neutropenia (FN). However, the current guidelines fail to recommend an optimal dosing schedule of pegfilgrastim along with the DCF regimen to prevent FN. In the present study, we assessed the efficacy and safety of giving pegfilgrastim early on day 3 during DCF therapy for esophageal cancer. In this single‐arm phase II study, patients with squamous cell carcinoma of the esophagus were recruited. They were treated with the DCF therapy on days 1‐5, with pegfilgrastim given on day 3. Primary endpoint was the occurrence of grade 4 neutropenia. Secondary endpoints included the incidence of FN, grade 3 neutropenia, dose delays/reductions, antitumor effect, and safety. Between July 2016 and December 2018, 23 patients were enrolled. The incidence of grade 4 neutropenia was 8.7% (95% confidence interval 1.1%‐28.0%). No patient experienced FN. Of the 19 patients who received two cycles of DCF, one required a dose reduction/treatment delay due to hematological toxicity in the second treatment cycle. No serious adverse events, considered relevant to pegfilgrastim, were observed. This is the first prospective study that showed an efficacious dosing schedule of pegfilgrastim for preventing hematological toxicity during DCF therapy. The results might be generalized to other similar regimens where continuous infusions of 5‐fluorouracil are used.

Early administration of pegfilgrastim for esophageal cancer treated with docetaxel, cisplatin, and fluorouracil: A phase II study