The progress of non-alcoholic fatty liver disease as the risk of liver metastasis in colorectal cancer.

Introduction: The liver is the most common metastatic site of colorectal cancer (CRC), and the long-term survival rate of CRC patients who cannot resect liver metastatic lesions radically is extremely low. Early identification of risk factors for liver metastasis from CRC may be an effective strategy to reduce the incidence of liver metastasis. The incidence of non-alcoholic fatty liver disease (NAFLD) is increasing in parallel with an increasing prevalence of obesity and metabolic syndrome (MS), which has become one of the main causes of chronic liver disease worldwide.Areas covered: An overview of the related research progress of the association between NAFLD and colorectal liver metastasis (CRLM).Expert opinion: Certain research proves that there is a close relationship between NAFLD and CRC, and the presence of NAFLD can promote the formation and development of CRC. Although the effect of liver diseases on the incidence of liver metastasis in CRC has been noted in recent years, the results are inconsistent and haven't reached a unified conclusion. Therefore, the association between liver metastasis and NAFLD remains the main focal point in the evolution of CRC.