Prognostic Value of BRAFV600 Mutations in Melanoma Patients After Resection of Metastatic Lymph Nodes
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- Moreau, S., Saiag, P., Aegerter, P. et al. Ann Surg Oncol (2012) 19: 4314. doi:10.1245/s10434-012-2457-5
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BRAFV600 mutations are frequent in melanomas, and BRAFV600-targeted therapy have dramatic, but often transitory, efficacy in stage IV patients. Prognosis of patients with American Joint Committee on Cancer (AJCC) stage III melanoma is heterogeneous. We aimed to determine the overall survival (OS) of stage III patients with a nodal deposit of ≥2 mm according to BRAFV600 mutations and other previously reported prognostic criteria.
This retrospective study included 105 consecutive patients with stage III cutaneous melanomas. Most patients underwent a prospective follow-up. BRAFV600 mutations were detected by sequencing and pyrosequencing of DNA in samples containing >60 % melanoma cells.
BRAF mutations (p.V600E and p.V600K in 83 and 14 % of cases, respectively) were detected in 40 % of the patients. For patients with and without BRAF mutations, death occurred in 83.3 and 60.3 %, with a median OS of 1.4 and 2.8 years, respectively. Patient age, primary melanoma ulceration, number of invaded lymph nodes, AJCC staging at study entry, and BRAF status were linked to OS in the univariate analysis. The only characteristics associated with OS in the multivariate analysis were number of invaded lymph nodes (P = 0.005, hazard ratio 2.2, 95 % confidence interval 1.3–3.9) and BRAF status (P = 0.005, hazard ratio 1.9, 95 % confidence interval 1.2–3.1).
BRAFV600 status could be used to stage melanoma patients with nodal deposits. Our results may also help to plan adjuvant trials in these patients, for whom the low tumor load may induce longer efficacy of BRAF-targeted therapies.