Pilot Study of Nivolumab w/Ipilimumab or Relatlimab in Surgically Resectable Melanoma Brain Metastases

Inclusion Criteria: * Age 18 years old or older on day of signing the informed consent. * Histological confirmation of systemic cancer from melanoma. * Surgery for metastatic brain lesions (i.e., MBM) is needed but not imminent. Imminent defined as requiring emergent intervention. A multidisciplinary team will determine the appropriateness for resection via craniotomy and level of urgency for surgery of the MBM. * Resectable metastatic brain lesions (i.e., MBM) in whom surgical resection is a reasonable therapeutic option. A resectable metastatic brain lesion is defined as a lesion that is ≥10 mm in size of longest diameter and in a location outside of the brainstem. (Other target lesions, i.e. those that are not resected but are followed for response, can be ≥5 mm). A multidisciplinary team will determine the appropriateness for resection via craniotomy and level of urgency for surgery of the MBM. * Patient is on ≤4 mg/day dexamethasone or equivalent/day over pre-op period. * Patients treated with prior monotherapy with PD-1/PD-L1 are permitted. * Treatment with BRAF MEK inhibitors (BRAF MEKi) (for example, dabrafenib / trametinib) is permitted as long as has been at least five half-lives or one week prior to study treatment, whichever is shorter. * MRI with enhancing metastatic brain lesions (i.e., MBM) amenable to resection of contrast-enhancing tumor (determined by neurosurgeon). A multidisciplinary team will determine the appropriateness for resection via craniotomy and…