Successful retreatment with combined BRAF/MEK inhibition in metastatic BRAFV600‐mutated melanoma

Abstract Background The combination treatment with BRAF and MEK inhibitors is amongst the current standard of care for stage IIIC / IV BRAF ‐mutated melanoma. However, therapeutic options are limited once patients have progressed upon both targeted and immunotherapy. Objective To investigate whether retreatment with BRAF and MEK inhibitor combination is an option for patients with metastatic BRAF ‐mutated melanoma upon previous progression on kinase inhibitors. Methods Two patients with metastatic BRAF ‐mutated melanoma were rechallenged with BRAF and MEK inhibitor combination after progression on targeted therapy and subsequent immunotherapy with anti‐ CTLA ‐4 and anti‐ PD ‐1 antibodies. Results Both patients responded to retreatment. Responses were limited to a few months and associated with a considerable increase in quality of life. Conclusion Retreatment with BRAF and MEK inhibitors may present a feasible treatment option upon progression on both kinase inhibitors and immunotherapy, and should be considered when all other treatment options have been exhausted.