Purpose
To determine if outpatient medications taken at the time of liver tumor embolization or ablation affect survival.
Methods
An IRB-approved retrospective review was performed of 2032 liver tumor embolization, radioembolization, and ablation procedures on 1092 patients from June 2009 to April 2016. For each patient, the following information was analyzed: pathology, hepatocellular carcinoma (HCC) stage (AJCC), neuroendocrine tumor (NET) grade, initial locoregional therapy, overall survival after initial locoregional therapy, Child Pugh score, ECOG performance status, Charlson comorbidity index, and outpatient medications taken at the time of locoregional therapy. Kaplan Meier survival curves were calculated for patients taking 29 medications or medication classes (including both prescription and non-prescription medications), which the patient was taking for reasons unrelated to their primary cancer diagnosis. Kaplan Meier curves were compared using the log-rank test.
Results
For HCC patients initially treated with embolization (n=304 patients), the following medications were associated with improved survival when taken at the time of embolization: beta blockers (p=0.0007), aspirin (p=0.0008) and other NSAIDs (p=0.009), proton pump inhibitors (p=0.004), and antivirals for HBV or HCV (p=0.01). For colorectal liver metastases initially treated with ablation (n=172 patients), beta blockers were associated with improved survival when taken at the time of ablation (p=0.02). For NET patients initially treated with embolization, and colorectal patients initially treated with radioembolization, there was no association between medications and survival.
Conclusion
Aspirin and beta blockers are associated with significantly improved survival when taken at the time of embolization for HCC. Aspirin was not associated with survival differences after locoregional therapy for NET or colorectal liver metastases, suggesting an HCC-specific effect.