Abdominal Ultrasound
Effect of time of initiating adjuvant chemotherapy on prognosis of patients with synchronous colorectal liver metastasis after microwave ablation
Lin Jing, Cui Rui, Qin Si, Chen Yao, Huang Yuxiao, Liu Guangjian
Published 2020-04-01
Cite as Chin J Med Ultrasound(Electronic Edition), 2020,17(04): 300-307. DOI: 10.3877/cma.j.issn.1672-6448.2020.04.003
Abstract
ObjectiveTo investigate the influence of time of initiating adjuvant chemotherapy (AC) on intrahepatic recurrence-free survival (RFS) and liver injury in patients with synchronous colorectal liver metastasis (CRLM) after receiving microwave ablation (MWA).
MethodsData were retrospectively collected from patients with synchronous CRLM undergoing ultrasound-guided percutaneous MWA combined with AC at our center from October 2013 to January 2019. According to the time of initiating AC relative to the date of MWA, the patients were categorized into two groups:≤4 weeks (G1) and 4~8 weeks (G2). Kaplan-Meier method and log-rank test were used to compare the RFS between the two groups. Cox regression models were used for univariate and multivariate analyses to identify predictors of RFS. Besides, the levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) before and after the first AC were also compared between the G1 and G2 groups.
ResultsA total of 144 patients were included in this study (G1, n=98; G2, n=46). Median RFS was 22.2 months. The RFS was significantly longer in the G1 group than in the G2 group (median RFS, 40.6 months vs 12.6 months, log-rank P=0.007). In Cox regression analysis, G2 (hazard ratio [HR]=1.917, 95% confidence interval CI: 1.104-3.327, P=0.021) and the number of tumors (HR=1.292, 95%CI: 1.096-1.524, P=0.002) were independent predictors of shorter RFS. There was no difference in ALT or AST level between the G1 and G2 groups before and after the first AC (P>0.05).
ConclusionFor synchronous CRLM patients, receiving AC within 4 weeks after MWA may be beneficial to longer RFS.
Key words:
Colorectal neoplasm; Liver metastasis; Microwave ablation; Recurrence; Adjuvant chemotherapy
Contributor Information
Lin Jing
Department of Medical Ultrasound, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
Cui Rui
Department of Medical Ultrasound, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
Qin Si
Department of Medical Ultrasound, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
Chen Yao
Department of Medical Ultrasound, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
Huang Yuxiao
Department of Medical Ultrasound, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
Liu Guangjian
Department of Medical Ultrasound, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China