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Proposal for Prognosis-Oriented Definition of Borderline Resectable Hepatocellular Carcinoma.
Journal of the American College of Surgeons 2024 Februrary 8
BACKGROUND: Owing to advances in the multidisciplinary treatment of hepatocellular carcinoma (HCC), a conceptualization and definition for borderline resectable (BR) HCC, which carries a high risk of recurrence, is warranted. In this study, we aimed to define BR-HCC using a prognosis-oriented approach.
METHODS: The study included an original cohort of 221 patients and an independent validation cohort of 181 patients who had undergone primary hepatic resection for HCC. To define oncological BR-HCC, we evaluated the risk factors for early recurrence beyond the Milan criteria within 1 year after hepatic resection using multivariable logistic regression models. Subsequently, we developed high-risk scores using the identified risk factors and defined BR-HCC. The utility of high-risk score was validated in the validation cohort.
RESULTS: In the original cohort (HBV:HCV=20%:29%), recurrence beyond the Milan criteria within 1 year was observed in 28 patients (13%), with a 5-year survival rate of 25%. Multivariable analysis identified risk factors for recurrence beyond the Milan criteria within 1 year, including serum α-fetoprotein levels ≥ 12 ng/ml (p=0.02), tumor diameters > 5 cm (p=0.02), tumor number ≥ 3 (p=0.001), and macrovascular invasion (p=0.04). BR-HCC was defined as a tumor with two or more identified risk factors, and 42 patients (19%) were diagnosed with BR-HCC, with a 5-year survival rate of 51%. In the validation cohort, 45 (25%) patients had BR-HCC, with a 5-year survival rate of 42%.
CONCLUSIONS: The prognosis-oriented definition of BR-HCC enabled us to identify patients who are susceptible to early unresectable recurrence and have poor survival after hepatic resection for HCC. For patients with BR-HCC, preoperative systemic therapy may be a viable option to improve post-resection outcomes.
METHODS: The study included an original cohort of 221 patients and an independent validation cohort of 181 patients who had undergone primary hepatic resection for HCC. To define oncological BR-HCC, we evaluated the risk factors for early recurrence beyond the Milan criteria within 1 year after hepatic resection using multivariable logistic regression models. Subsequently, we developed high-risk scores using the identified risk factors and defined BR-HCC. The utility of high-risk score was validated in the validation cohort.
RESULTS: In the original cohort (HBV:HCV=20%:29%), recurrence beyond the Milan criteria within 1 year was observed in 28 patients (13%), with a 5-year survival rate of 25%. Multivariable analysis identified risk factors for recurrence beyond the Milan criteria within 1 year, including serum α-fetoprotein levels ≥ 12 ng/ml (p=0.02), tumor diameters > 5 cm (p=0.02), tumor number ≥ 3 (p=0.001), and macrovascular invasion (p=0.04). BR-HCC was defined as a tumor with two or more identified risk factors, and 42 patients (19%) were diagnosed with BR-HCC, with a 5-year survival rate of 51%. In the validation cohort, 45 (25%) patients had BR-HCC, with a 5-year survival rate of 42%.
CONCLUSIONS: The prognosis-oriented definition of BR-HCC enabled us to identify patients who are susceptible to early unresectable recurrence and have poor survival after hepatic resection for HCC. For patients with BR-HCC, preoperative systemic therapy may be a viable option to improve post-resection outcomes.
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