This is a phase I/II national, open-label, single-arm, interventional study examining safety and tolerability for the ipilimumab/UV1 combination in patients with unresectable or metastatic malignant melanoma.

Patients that have signed the informed consent form will be asked to take part in the study.

All patients will receive ipilimumab together with the UV1 vaccine and rranulocyte-macrophage colony-stimulating factor (GM-CSF). Ipilimumab will be given every 3rd week for a total of 4 doses.

The UV1 vaccine and GM-CSF will be given before and between treatments of ipilimumab. The maximum number of UV1/GM-CSF will be 10 doses.

Immunoresponders may be followed up every third month for 5 years after the first UV1 treatment. Follow-up is ongoing.