Efficacy of postoperative adjuvant transcatheter arterial chemoembolization in hepatocellular carcinoma patients with microvascular invasion

Jia-Zhou Ye, Jun-Ze Chen, Zi-Hui Li, Tao Bai, Jie Chen, Shao-Liang Zhu, Le-Qun Li, Fei-Xiang Wu, Jia-Zhou Ye, Jun-Ze Chen, Zi-Hui Li, Tao Bai, Jie Chen, Shao-Liang Zhu, Le-Qun Li, Fei-Xiang Wu

Abstract

Aim: To investigate the efficacy and safety of postoperative adjuvant transcatheter arterial chemoembolization (PA-TACE) in preventing tumor recurrence and improving survival in Barcelona Clinic Liver Cancer (BCLC) early (A) and intermediate (B) stage hepatocellular carcinoma (HCC) patients with microvascular invasion (MVI).

Methods: A total of 519 BCLC A or B HCC patients treated by liver resection alone or followed by PA-TACE between January 2012 and December 2015 were studied retrospectively. Univariate and multivariate analyses were performed to investigate the risk factors for recurrence-free survival (RFS) and overall survival (OS). Multiple logistic regression was used to identify the clinicopathological characteristics associated with MVI. The rates of RFS and OS were compared among patients with or without MVI treated with liver resection alone or followed by PA-TACE.

Results: Univariate and multivariate analyses demonstrated that serum AFP level > 400 ng/mL, tumor size > 5 cm, tumor capsule invasion, MVI, and major hepatectomy were risk factors for poor OS. Tumor capsule invasion, MVI, tumor size > 5 cm, HBV-DNA copies > 1 x 104 IU/mL, and multinodularity were risk factors for poor RFS. Multiple logistic regression identified serum AFP level > 400 ng/mL, tumor size > 5 cm, and tumor capsule invasion as independent predictors of MVI. Both OS and DFS were significantly improved in patients with MVI who received PA-TACE as compared to those who underwent liver resection alone. Patients without MVI did not show a significant difference in OS and RFS between those treated by liver resection alone or followed by PA-TACE.

Conclusion: PA-TACE is a safe adjuvant intervention and can efficiently prevent tumor recurrence and improve the survival of BCLC early- and intermediate-stage HCC patients with MVI.

Keywords: Hepatocellular carcinoma; Microvascular invasion; Overall survival; Postoperative adjuvant transcatheter arterial chemoembolization; Recurrence-free survival.

Conflict of interest statement

Conflict-of-interest statement: The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Overall survival and recurrence-free survival curves of hepatocellular carcinoma patients who either underwent liver resection alone or followed by postoperative adjuvant transcatheter arterial chemoembolization. A: OS for HCC/MVI (-) patients (P = 0.872); B: OS for HCC/MVI (+) patients (P = 0.019); C: RFS for HCC/MVI (-) patients (P = 0.974); D: RFS for HCC/MVI (+) patients (P = 0.002). OS: Overall survival; HCC: Hepatocellular carcinoma; MVI: Microvascular invasion; RFS: Recurrence-free survival.

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