Evaluation of the Safety and Efficacy of Treatment w/High Dose Melphalan Given Directly Into the Liver Followed by Treatment w/Approved Cancer Treatment or Approved Cancer Treatment Alone in Patients w/ Metastatic Colorectal Cancer w/Liver Dominant Disease

Inclusion Criteria: * Histologically confirmed diagnosis of metastatic colorectal cancer and histologically or cytologically proven CRC metastases that occupy 50% or less of the liver parenchyma. * Patient has liver-dominant metastatic disease. Liver-dominant is defined as the majority of total tumor burden is located in the liver, and the liver lesions are not resectable or treatable with ablation or are associated with extrahepatic disease that makes surgical intervention non-curative. * Disease in the liver must be measurable (per RECIST v.1.1 guidelines) by computed tomography (CT) and/or magnetic resonance imaging (MRI). * If there is evidence of extrahepatic metastatic disease, it is limited, and the life-threatening component of disease is in the liver. Limited extrahepatic disease is defined in this protocol as follows: up to 5 tumor lesions in the lung with longest diameter not greater than 2 cm and/or up to 5 lymph nodes that measure 2 cm or less per lesion; solitary lesions definitively treated with no sign of progression in the last 6 months. * Scans used to determine eligibility (CT scan of the chest/abdomen/pelvis and MRI of the liver) must be performed within 28 days prior to randomization. * Previous treatment and progressed on or following, or intolerant to, fluoropyrimidine-, oxaliplatin- and irinotecan-based chemotherapy, an anti-VEGF biological therapy, and/or an anti-EGFR therapy if RAS wild-type. * ECOG PS of 0-1 within 14 days prior to randomization. …