A chemoimmunotherapy regimen consisting of leucovorin (folinic acid), 5-fluorouracil, and irinotecan plus cetuximab used for the treatment of metastatic colorectal cancer that is positive for the expression of the epidermal growth factor receptor (EGFR) and the wild-type form of KRAS. or A chemotherapy combination used as an initial treatment of colorectal cancer that has spread. It includes the drugs leucovorin (folinic acid), fluorouracil, irinotecan hydrochloride, and bevacizumab. Also called FOLFIRI-Avastin regimen and FOLFIRI-bevacizumab.