PVSRIPO in Combination With Nivolumab in Melanoma

In this study, patients with metastatic melanoma who have at least one injectable lesion that has been refractory to PD-1 therapy (n=30 patients) will be enrolled. Cohort 1 will include 15 patients who progressed within 3 months (primary resistance) of starting PD-1 therapy and cohort 2 will be patients who progressed after at least 3 months of PD-1 therapy. Patients will receive up to 7 injections of PVSRIPO intra-lesionally in combination with Nivolumab. Nivolumab will be administered according to the FDA-approved dosing schedule of 480 mg intravenously every 4 weeks, beginning \~10 days after the first PVSRIPO infusion and will continue for 4 cycles. Nivolumab may be continued up to 2 years per standard of care after the completion of the PVSRIPO injections.