
Opinion|Videos|November 14, 2023
Best Practices for Biomarker Testing in Metastatic Melanoma
When a patient with metastatic melanoma patient tests negative for the BRAF V600E mutation, doctors recommend sending the sample for next-generation sequencing testing which can take 2-3 weeks, during which time they may start immunotherapy if the patient has aggressive disease, but ideally should wait for results to guide treatment.
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The NCCN update adds locally advanced CSCC to the category 2A listing cosibelimab received in metastatic disease in 2025.

The opinion supports 700 mg every 6 weeks after 12 weeks of 350 mg every 3 weeks; a European Commission decision is expected in the coming months.
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