Transarterial Chemoembolization Treatment Paradigms for Hepatocellular Carcinoma

Simple Summary Hepatocellular carcinoma (HCC) is the most common primary liver cancer, comprising 90% of liver cancer cases worldwide, with a five-year survival rate of less than 20%. Standard treatments for early-stage HCC include surgical resection and liver transplantation, but many patients are diagnosed at later stages and are ineligible for these interventions. For such patients, transarterial chemoembolization (TACE) is an alternative treatment that delivers chemotherapy directly to the tumor and blocks its blood supply. TACE can be used to help patients maintain eligibility for transplants, improve liver function, and alleviate symptoms. It is particularly effective for intermediate-stage HCC but also shows promise in the early and advanced stages when combined with other therapies. While generally safe, TACE can cause post-embolization syndrome (PES) and other complications in a minority of cases. The efficacy of TACE is continually being improved through advancements in techniques and the integration of novel systemic therapies and artificial intelligence for better patient selection and outcomes.Abstract Hepatocellular carcinoma (HCC) accounts for 90% of liver cancer cases worldwide and is currently the most quickly increasing cause of cancer-related deaths in the United States. The 5-year survival rate for primary liver cancer is estimated to be below 20%, and HCC mortality is expected to increase by 41% by 2040. Currently, surgical resection is the first-line approach to definitive treatment of early-stage HCC. However, the majority of patients present with late-stage, unresectable disease due to the asymptomatic nature of early HCC. For patients who present with unresectable HCC, locoregional therapies such as transarterial chemoembolization (TACE) represent an alternative approach to HCC treatment. TACE is a minimally invasive, catheter-based technique that allows for targeted delivery of chemotherapy to tumor sites while occluding tumor-feeding blood vessels. In appropriately selected patients, outcomes for TACE therapy have been shown to be more favorable than supportive care or conservative management. The increasing incidence and mortality of HCC, in addition to the late-stage presentation of most HCC patients, demonstrates the need to expand the role of locoregional therapies in the treatment of HCC. TACE represents an appealing approach to HCC management, including disease control, palliation, and potentially curative-intent strategies. In this review, we will describe the current utility of TACE in the treatment of HCC, characterize the outcomes of patients treated with TACE across different HCC stages, and outline future applications of TACE in the treatment paradigm.