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- W2970252746 abstract "8540 Background: Prognosis of AJCC stage III melanoma is heterogeneous. BRAF V600 mutations are frequent in melanomas. BRAF V600 -targeted therapy has dramatic, but often transitory, efficacy in stage IV patients (pts). We aimed to determine for the first time the prognostic value of BRAF V600 mutations and other known prognostic criteria in stage III pts with sufficient nodal invasion. Methods: We searched all pts with cutaneous melanoma who had radical lymphadenectomy in our institution between 1/1/00 and 15/6/10 and included those with a nodal deposit >2 mm. BRAF V600 mutations were detected by DNA sequencing and pyrosequencing in formalin-fixed nodal samples containing >60% melanoma cells. Samples were considered mutated when >15% of DNA was positive. Endpoints were overall survival (OS) and distant metastasis free survival (DMFS). 92 patients had to be included to demonstrate a doubling of OS in patients without (40 months (m)) and with BRAF V600 mutation (20 m). Log-rank test and multivariate Cox proportional hazards regression model were used. Results: 105 consecutive pts were included, with 72% prospectively followed-up pts. BRAF V600 mutations (E: 83%; K: 14% of pts) were detected in 40% of pts. Median follow-up was 19 m (range: 3-139). Death occurred in 83% and 60% of pts with and without BRAF mutations, respectively, with median OS of 1.4 and 2.8 years. Pts’ age, primary melanoma ulceration, number of invaded nodes, AJCC staging, and BRAF status influenced OS and DMFS in the univariate analysis. The multivariate analysis showed the major prognostic role of BRAF status and of the number of invaded nodes (table). Conclusions: Provided our findings are independently replicated, BRAF V600 status should be used to stage melanoma pts with nodal metastasis. Our results also help to plan adjuvant trials with BRAF V600 -targeted therapy in such patients, for whom the low tumor load may induce longer efficacy of BRAF-targeted therapies. [Table: see text]" @default.
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- W2970252746 date "2012-05-20" @default.
- W2970252746 modified "2023-10-18" @default.
- W2970252746 title "Prognostic value of BRAFV600 mutations in melanoma patients after resection of metastatic lymph nodes." @default.
- W2970252746 doi "https://doi.org/10.1200/jco.2012.30.15_suppl.8540" @default.
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