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MINI 15 - Chemotherapy Developments for Lung Cancer (ID 128)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
MINI15.11 - Optimal Second Line Chemotherapy after 1st Line Pemetrexed and Cisplatin Treatment in EGFR Mutation Negative Advanced NSCLC Patients (ID 1356)
16:45 - 18:15 | Author(s): J.K. Sim
Pemetrexed and cisplatin (P-C) has become the standard 1st line chemotherapy in NSCLC patients with wild-type EGFR. The recommended drugs in the 2nd line are docetaxel, docetaxel plus ramucirumab, gemcitabine or EGFR TKIs. Gemcitabine and vinorelbine have good clinical efficacies and low toxicity profiles, so this two drug combination therapy is challenged for their clinical efficacy as 2nd line treatment. The optimal 2nd line chemotherapy following failure of 1st line P-C treatment in advanced NSCLC patients with wild-type EGFR is not yet defined. Therefore, we evaluated the optimal 2nd line chemotherapy in P-C non-responders with advanced NSCLC.
We conducted a retrospective analysis of patients with stage IIIB or IV NSCLC who had been treated with P-C as a first line treatment from February 2010 to May 2014. Patients who had EGFR mutation or were on pemetrexed maintenance therapy were excluded. We compared the progression free survival, overall response rate and adverse effects of each regimen.
Among 110 patients, 52 were eligible for the study. 28 received EGFR TKI (gefitinib or erlotinib); 13 received docetaxel monotherapy; 11 received gemcitabine-vinorelbine (G-V) combination therapy. Median age was 64.5, 61 and 63 years, respectively. All patients showed adenocarcinoma type histology except two in docetaxel and G-V group with large cell type histology. Best response rates were 15.4% in docetaxel group, 18.1% in G-V group and 11% in EGFR TKIs group. Median progression free survival time was 62 days(95% CI 54-70) in EGFR TKIs group, 63 days (95% CI 30-96) in docetaxel group, and 83 days (95% CI 55-111) in G-V group (P=0.17). In pairwise comparisons, p-value was 0.54 for EGFR TKI versus docetaxel group, 0.08 for TKI versus G-V group, and 0.23 for docetaxel versus G-V group. There were no difference in progression-free survival and response rate among the groups. There was a higher rate of grade 3/4 neutropenia in the Docetaxel group.
Despite the absence of statistical significance, there was a trend that G-V combination therapy had longer progression-free survival outcome compared to EGFR TKI or Docetaxel groups. G-V as well showed better toxicity profiles compared to Docetaxel group. A larger study is required to confirm the efficacy of cytotoxic chemotherapy, especially G-V, as a second line treatment in EGFR mutation negative NSCLC patients.
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