Cancer Clinical Research Unit

Inclusion Criteria: - Signed informed consent by patients ≥ 18 years of age and, assent for patients ≥ 12 up to < 18 years of age - Patients must have radiographically-recurrent or radiographically-progressive disease that is measurable using the appropriate tumor response criteria (e.g. RECIST version 1.1) - Archival tumor tissue (preferably less than 3 years old) or fresh tumor tissue for correlative studies is required - If brain metastases are present, they must have been previously treated and be stable as assessed by radiographic imaging Substudy A-specific inclusion criterion: - Patients must have a report of histologically confirmed diagnosis of melanoma or other solid tumor and a concurrent BRAF fusion, CRAF/RAF1 fusion, or CRAF/RAF1 amplification through a tumor or liquid biopsy as assessed by genomic sequencing, polymerase chain reaction (PCR), fluorescence in situ hybridization (FISH), or another clinically accepted molecular diagnostic method recognized by local laboratory or agency. Substudy B-specific inclusion criterion: - Patients must have a report of histologically confirmed diagnosis of melanoma or other solid tumor and a concurrent MAPK pathway alteration (genomic alterations in RAS, RAF, MEK, or NF1) through a tumor or liquid biopsy as assessed by genomic sequencing, PCR, FISH, or another clinically accepted molecular diagnostic method recognized by local laboratory or agency. Exclusion Criteria: - Known presence of concurrent activating mutation - Patients with current evidence or a history of central serous retinopathy (CSR), retinal vein occlusion (RVO) Substudy A-specific exclusion criterion: - Prior therapy of any RAS- RAF-, MEK-, or ERK-directed inhibitor therapy