Testing Pump Chemotherapy in Addition to Standard of Care Chemotherapy Versus Standard of Care Chemotherapy Alone for Patients With Unresectable Colorectal Liver Metastases: The PUMP Trial

Inclusion Criteria: * Patient must be \>= 18 years of age * Patient must have confirmed unresectable liver confined metastatic colorectal cancer (CRC). * Patient must not have radiographically or clinically evident extrahepatic disease (including but not limited to radiographically positive periportal lymph nodes). * NOTE: Patients found to have positive periportal nodes at the time of HAI placement can remain on study. * Patient may have calcified pulmonary nodules, and/or =\< 5 indeterminate and stable (for a minimum of 3 months on chemotherapy) pulmonary nodules each measuring =\< 6 mm in maximal axial dimension. * Patient's primary tumor may be in place. * Patient must have received 3-6 months of previous first-line chemotherapy that meet one of the following three criteria: a) have received at least 6 but no more than 12 cycles of first-line cytotoxic chemotherapy (where 1 cycle = 14 days) OR b) have received at least 4 but no more than 8 cycles of first-line cytotoxic chemotherapy (where 1 cycle = 21 days) OR c) have developed new colorectal liver metastases (CRLM) within 12 months of completing adjuvant systemic therapy for stage II-III colorectal cancer. * NOTE: First-line chemotherapy may have included any of the following regimens as listed in the National Comprehensive Cancer Network (NCCN) Guidelines: leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin (FOLFOX) (or equivalent), leucovorin calcium (calcium folinate), 5-fluorouracil, and…