Melanoma Metastasized to the Brain and Steroids

This study looks at whether using steroid medications (like prednisone or dexamethasone) to manage brain swelling in patients with melanoma that has spread to the brain affects how well immunotherapy and other cancer treatments work. **You may be eligible if...** - You have been diagnosed with melanoma (a type of skin cancer) that has spread to the brain, confirmed by imaging scans - You need steroid treatment to manage brain swelling (for example, prednisone more than 10 mg/day or dexamethasone more than 1.6 mg/day) - You have at least one measurable area of cancer - You are 18 years or older and in reasonable physical condition - You are able to have an MRI with contrast dye **You may NOT be eligible if...** - You are pregnant or unable to use effective contraception - Your organ function does not meet the required levels - You had significant side effects from previous cancer treatments Talk to your doctor to see if this trial is right for you.