BRAF inhibitor treatment is feasible in the oldest-old advanced melanoma patients.

Abstract

Although new compounds have improved the treatment landscape of metastatic melanoma, very limited data exist on the efficacy and safety of treating older patients with novel agents. Here, we provide results of BRAF (BRAFi) ± MEK (MEKi) inhibitor treatment in patients over 75 years (oldest-old patients) with metastatic melanoma. Between 2011 and 2020, 34 consecutive patients with metastatic melanoma over 75 years of age (range 75-89) were treated with BRAFi ± MEKi at the Comprehensive Cancer Center of Helsinki University Hospital. Data on clinical and histopathological features, toxicity, response rate (RR), progression-free survival (PFS) and overall survival (OS) were collected. Patients were treated with BRAFi (n = 22) or BRAFi in combination with MEK inhibitor (MEKi) (n = 12). Grade 1-2 adverse events occurred in 68% of the patients, 32% had grade 3 adverse effects, dose reductions were made for 41% of patients and 29% terminated treatment due to toxicity. Overall, the RR was 62%. Complete responses were achieved in 27% of the patients, and 35% had partial responses. The median PFS was 8 months (range 0-57), and the median OS was 15 months (range 0-71). Tailored BRAFi ± MEKi treatment for older patients is feasible. Adverse effects occur frequently but are manageable by dose adjustment. The occurrence of toxicity of monotherapy was similar to that of combination therapy. The RR and median OS from our retrospective study are comparable with those reported in clinical trials and combination therapy produced somewhat more and longer-lasting responses. Hence, it seems that older patients may benefit from BRAFi treatment.