Chemoembolization is a minimally invasive procedure used to treat certain types of cancer, particularly liver cancer. This procedure involves delivering chemotherapy drugs directly to the tumor through a catheter, followed by the injection of embolic agents to block blood flow to the tumor and trap the chemotherapy drugs in the targeted area. This method helps to increase the concentration of chemotherapy in the tumor while minimizing systemic side effects. Chemoembolization is often used as a palliative treatment for liver cancer patients who are not eligible for surgery or liver transplantation.