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Stereotactic Body Radiation Therapy With or Without Transarterial Chemoembolization Versus Transarterial Chemoembolization Alone in Early-Stage Hepatocellular Carcinoma: A Systematic Review and Meta-Analysis.
Journal of Gastrointestinal Cancer 2023 December
PURPOSE: This study aims to review the current evidence on the utility of stereotactic body radiation therapy (SBRT), with or without transarterial chemoembolization (TACE), for early-stage hepatocellular carcinoma (ESHCC) patients not amenable to standard curative treatment options.
METHODS: Literature search was conducted using PubMed, ScienceDirect, and Google Scholar. Comparative studies reporting oncologic outcomes were included in the review.
RESULTS: Five studies (one phase II randomized controlled trial, one prospective cohort, three retrospective studies) compared SBRT versus TACE. Pooled analysis showed an overall survival (OS) benefit after 3 years (OR 1.65, 95% CI 1.17-2.34, p = 0.005) which persisted in the 5-year data (OR 1.53, 95% CI 1.06-2.22, p = 0.02) in favor of SBRT. RFS benefit with SBRT was also seen at 3 years (OR 2.06, 95% CI 1.03-4.11, p = 0.04) which continued after 5 years (OR 2.35, 95% CI 1.47-3.75, p = 0.0004). Pooled 2-year local control (LC) favored SBRT over TACE (OR 2.96, 95% CI 1.89-4.63, p < 0.00001). Two retrospective studies compared TACE + SBRT versus TACE alone. Pooled analysis showed significantly improved 3-year OS (OR 5.47; 95% CI 2.47-12.11, p < 0.0001) and LC (OR: 21.05; 95% CI 5.01-88.39, p ≤ 0.0001) in favor of the TACE + SBRT group. A phase III study showed significantly improved LC and PFS with SBRT after failed TACE/TAE versus further TACE/TAE.
CONCLUSIONS: Taking into account the limitations of the included studies, our review suggests significantly improved clinical outcomes in all groups having SBRT as a component of treatment versus TACE alone or further TACE. Larger prospective studies are warranted to further define the role of SBRT and TACE for ESHCC.
METHODS: Literature search was conducted using PubMed, ScienceDirect, and Google Scholar. Comparative studies reporting oncologic outcomes were included in the review.
RESULTS: Five studies (one phase II randomized controlled trial, one prospective cohort, three retrospective studies) compared SBRT versus TACE. Pooled analysis showed an overall survival (OS) benefit after 3 years (OR 1.65, 95% CI 1.17-2.34, p = 0.005) which persisted in the 5-year data (OR 1.53, 95% CI 1.06-2.22, p = 0.02) in favor of SBRT. RFS benefit with SBRT was also seen at 3 years (OR 2.06, 95% CI 1.03-4.11, p = 0.04) which continued after 5 years (OR 2.35, 95% CI 1.47-3.75, p = 0.0004). Pooled 2-year local control (LC) favored SBRT over TACE (OR 2.96, 95% CI 1.89-4.63, p < 0.00001). Two retrospective studies compared TACE + SBRT versus TACE alone. Pooled analysis showed significantly improved 3-year OS (OR 5.47; 95% CI 2.47-12.11, p < 0.0001) and LC (OR: 21.05; 95% CI 5.01-88.39, p ≤ 0.0001) in favor of the TACE + SBRT group. A phase III study showed significantly improved LC and PFS with SBRT after failed TACE/TAE versus further TACE/TAE.
CONCLUSIONS: Taking into account the limitations of the included studies, our review suggests significantly improved clinical outcomes in all groups having SBRT as a component of treatment versus TACE alone or further TACE. Larger prospective studies are warranted to further define the role of SBRT and TACE for ESHCC.
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