期刊
ONCOTARGET
卷 8, 期 62, 页码 105000-105010出版社
IMPACT JOURNALS LLC
DOI: 10.18632/oncotarget.21072
关键词
cfDNA; digital PCR; drug cost; relapse-free survival
资金
- National Comprehensive Cancer Network (NCCN) Oncology Research Program from Novartis Pharmaceuticals Corporation
- NCI Cancer Center Support Grant (CCSG) [P30 CA08748]
Background: We tested the hypothesis that a 4-month course of adjuvant dabrafenib in stage IIIC BRAF-mutated melanoma would improve 2 year RFS from 24% to 51%, and that tumor-derived cell free DNA (cfDNA) in plasma would correlate with and predict recurrence. Methods: Patients with stage IIIC BRAF V600E/K mutated melanoma who were free of disease after surgical resection received 4 months of adjuvant dabrafenib. Patients were evaluated with imaging at baseline, at the end of cycles 2, 4, 6, then every 3 months until disease relapse or 2 years, whichever came first. Serial blood samples were collected for evaluation of cfDNA at the same time. Results: 21/23 patients enrolled were evaluable; 2 patients withdrew consent during the first week of treatment. The 2 year RFS was 28.6% (95% CI 12-48%). The estimated overall survival at 2 years was 78% (95% CI 51-91%). cfDNA detection had a 53% sensitivity in relapsing patients but cfDNA detection did not provide lead-time advantage over CT scanning. Conclusion: A 4-month course of adjuvant dabrafenib did not result in a detectable improvement in 2-year RFS. cfDNA was less sensitive than standard CT imaging and did not provide a lead-time advantage in detecting relapse.
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