Background/aim: The aim of this study was to examine the efficacy and safety of direct oral anticoagulants for cancer-associated venous thromboembolism (VTE) in patients with active cancer.
Patients and methods: This study included patients with advanced unresectable/metastatic upper gastrointestinal (GI) or hepatopancreatobiliary (HPB) cancers with high risks of VTE and bleeding.
Results: No significant differences were noted in potential bleeding factors between the rivaroxaban (n=105) and low-molecular-weight heparin (LMWH) (n=69) groups. Rivaroxaban exhibited similar risk of recurrent/aggravated VTE compared with LMWH (p=0.625) but increased risk of major bleeding (17.4% vs. 7.6%; p=0.072), clinically relevant bleeding (31.9% vs. 14.3%; p=0.019), and total bleeding (40.6% vs. 19%; p=0.010). The multivariate analysis regarded rivaroxaban as a significant factor for major bleeding (p=0.043) and clinically relevant bleeding (p=0.043).
Conclusion: Rivaroxaban exhibits comparable efficacy but increases bleeding risks compared with LMWH in patients with active unresectable/metastatic upper GI tract or HPB cancers, requiring extra caution of higher major bleeding risks.
Keywords: Rivaroxaban; gastrointestinal tract cancer; hepatopancreatobiliary cancer; low-molecular-weight heparin; venous thromboembolism.
Copyright© 2020, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.