Panitumumab With or Without Trametinib in Treating Patients With Stage IV Colorectal Cancer

Inclusion Criteria: * Histologically or cytologically confirmed colorectal adenocarcinoma, with metastatic disease documented on diagnostic imaging studies * Progression during or within 6 months after fluoropyrimidine, irinotecan, and oxaliplatin; for oxaliplatin-based therapy, failure of therapy will also include patients who progressed within 12 months of adjuvant therapy and patients who had oxaliplatin discontinued secondary to toxicity or allergic reaction; patients with a known history of Gilbert's disease who cannot receive irinotecan or patients who are intolerant of irinotecan or fluoropyrimidine are eligible * Confirmed wild-type status in KRAS exons 2, 3, and 4; NRAS exons 2, 3, and 4; and BRAF, by standard of care testing of tumor specimen; tissue used for testing may have been collected prior to treatment with anti-EGFR therapy * Patient must have been already tested and have available results of the mutations status of KRAS/NRAS/BRAF/MEK (MAP2K1) and EGFR from the circulating tumor DNA within 10 weeks prior to starting study therapy * Previous treatment with anti-EGFR therapy with evidence of clinical benefit, as defined by complete response, partial response, or prolonged stable disease with 16 or more weeks of treatment without radiographic progression, as assessed by the treating physician and documented in the medical record; this treatment may have occurred at any point in the patient's clinical course for treatment of metastatic colorectal cancer * Ultim…