In this study, A-FABP and Il-FABP serum levels were measured in 100 patients (38 with colon cancer and 62 with rectal cancer) who had been diagnosed with colorectal cancer without surgery, radiotherapy, or chemotherapy using the ELISA method before and after 2 weeks of radical resection of colorectal cancer. The gene discussed is FABP4; the disease is colorectal cancer.