Vinorelbine plus platinum in patients with metastatic triple negative breast cancer and prior anthracycline and taxane treatment

Abstract

Currently, there is no preferred standard chemotherapy regimen available for patients with metastatic triple negative breast cancer (mTNBC) and no cohort studies on the efficacy of vinorelbine plus platinum (NP) regimen in patients with mTNBC who failed to anthracyclines and/or taxanes have been reported. We present the single-center, retrospective experience of NP regimen in a total of 41 patients with mTNBC. All patients were treated with NP regimen, main combination used was vinorelbine-cisplatin in 34 patients (82.9%). The median follow-up was 36.8 months. Objective response rate was 34.1% (n = 14) in the whole study group. Three patients experienced complete response (7.3%), 11 patients acquired partial response (26.8%), stabledisease wasobservedin14patients (34.1%), and10patients(24.4%) had progressive disease. Response evaluation was not applicable in 3 patients who received the treatment of NP regimen after surgical removal of the metastatic lesions. The median overall survival and progression-free survival were 18.9 months (95% confidence interval, 15.6-22.1 months) and 6.7 months (95% confidence interval, 2.9-10.5 months), respectively. The main adverse events were grade 3/4 neutropenia (n= 20, 48.8%) and grade 1/2 gastrointestinal toxicity (n = 20, 48.8%). NP regimen is active and tolerable in patients with mTNBC pretreated with anthracyclines and/or taxanes. Therefore, among other chemotherapy regimens, NP combination may provide a rational treatment option for this patient subset.