Zhao JJ, Tan E, Sultana R, Syn NL, Da Zhuang K, Leong S, Tai DWM, Too CW. Intra-arterial therapy for unresectable colorectal liver metastases: A meta-analysis.
J Vasc Interv Radiol 2021;
32:1536-1545.e38. [PMID:
34166803 DOI:
10.1016/j.jvir.2021.05.032]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 05/09/2021] [Accepted: 05/31/2021] [Indexed: 11/19/2022] Open
Abstract
PURPOSE
To evaluate the efficacy of hepatic arterial infusion (HAI), conventional trans-arterial chemoembolization (cTACE), drug-eluting embolic trans-arterial chemoembolization (DEE-TACE), trans-arterial radioembolization (TARE) and their combinations with systemic chemotherapy (SCT) for unresectable colorectal liver metastases.
METHODS
A search was conducted on EMBASE, Scopus, PubMed and Web of Science for prospective non-randomized studies and randomized controlled trials (RCTs) from inception to 20th June 2020. Survival data of patients were recovered from original Kaplan-Meier curves by exploiting a graphical reconstructive algorithm. One-stage meta-analyses were conducted for median overall survival (OS), survival rates (SR), and restricted mean survival time (RMST), while two-stage meta-analyses of proportions were conducted to determine response rates (RR) and conversion-to-resection rates (CRR).
RESULTS
71 prospective non-randomized studies and 21 RCTs were identified comprising 6,695 patients. Among patients treated beyond first line, DEE-TACE+SCT (n=152) had the best survival outcomes of median OS of 26.5 (95%-CI: 22.5-29.1) months and 3-year RMST of 23.6 (95%-CI: 21.8-25.5) months. Upon further stratification by publication year, DEE-TACE+SCT appears to consistently have the highest pooled survival rates at 1-year (81.9%) and 2-years (66.1%) in recent publications (2015-2020). DEE-TACE+SCT and HAI+SCT had the highest pooled-RRs of 56.7% (I2=0.90) and 62.6% (I2=0.87) respectively and pooled-CRRs of 35.5% (I2=0.00) and 30.3% (I2=0.80) respectively.
CONCLUSION
Albeit significant heterogeneity, paucity of high-quality evidence and the non-comparative nature of all analyses, the overall evidence suggests that patients treated with DEE-TACE+SCT may have the best oncological outcomes and greatest potential to be converted for resection.
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