Rationale And Objectives: Portal vein tumor thrombus (PVTT) seriously reduces the survival of patients with hepatocellular carcinoma (HCC). CT-guided iodine-125 (I) brachytherapy has the advantage of a high local control rate and is minimally invasive. This study aims to evaluate the safety and efficacy of I brachytherapy for treating PVTT in HCC patients.
Materials And Methods: Thirty-eight patients diagnosed with HCC complicated with PVTT and treated with I brachytherapy for PVTT were included in this retrospective study. The local tumor control rate, local tumor progression-free survival, and overall survival (OS) were analyzed. Cox proportional hazards regression analysis was performed to identify predictors affecting survival.
Results: The local tumor control rate was 78.9% (30/38). The median local tumor progression-free survival was 11.6 (95% confidence interval [CI]: 6.7, 16.5) months, and the median overall survival was 14.5 (95% CI: 9.2, 19.7) months. Multivariate Cox analysis showed that age <60 years (hazard ratio [HR] = 0.362; 95% CI: 0.136, 0.965; p = 0.042), type I+II PVTT (HR = 0.065; 95% CI: 0.019, 0.228; p < 0.001), and tumor diameter <5 cm (HR = 0.250; 95% CI: 0.084, 0.748; p = 0.013) were significant predictors of OS. There were no serious adverse events related to I seed implantation during the follow-up period.
Conclusion: CT-guided I brachytherapy is effective and safe for treating PVTT of HCC, with a high local control rate and no severe adverse events. Patients younger than 60 years old with type I+II PVTT and a tumor diameter less than 5 cm have a more favorable OS.
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