- •Data regarding direct oral anticoagulants (DOACs) appear safe for venous thromboembolism (VTE) treatment for patients with RCC on cabozantinib
- •No. of major bleeding events similar between no anticoagulant, low molecular weight heparin (LMWH) or DOAC groups.
- •The rate of new/recurrent VTE was similar among anticoagulant groups
- •Patients with a VTE had significantly worse survival than those without a VTE
In patients with renal cell carcinoma (RCC) on cabozantinib, venous thromboembolism (VTE) management remains challenging due to limited safety data regarding direct oral anticoagulants (DOACs) use in conjunction with cabozantinib. We investigated the safety of cabozantinib with different anticoagulants in patients with RCC.
In this retrospective multicenter study (9 sites), patients with advanced RCC were allocated into 4 groups: (1) cabozantinib without anticoagulation, cabozantinib with concomitant use of (2) DOACs, (3) low molecular weight heparin (LMWH), or (4) warfarin. The primary safety endpoint was the proportion of major bleeding events (defined per International Society on Thrombosis and Hemostasis criteria). The primary efficacy endpoint was the proportion of new/recurrent VTE while anticoagulated.
Between 2016 and 2020, 298 patients with RCC received cabozantinib (no anticoagulant = 178, LMWH = 41, DOAC = 64, and warfarin = 15). Most patients had clear cell histology (78.5%) and IMDC intermediate/poor disease (78.2%). Cabozantinib was first, second, or ≥ third line in 21.8%, 31.9%, 43.3% of patients, respectively. Overall, there was no difference in major bleeding events between the no anticoagulant, LMWH, and DOAC groups (P = .088). Rate of new/recurrent VTE was similar among anticoagulant groups. Patients with a VTE had a statistically significantly worse survival than without a VTE (HR 1.48 [CI 95% 1.05-2.08, P = .02]).
This real-world cohort provides first data on bleeding and thrombosis complications in patients with RCC treated with cabozantinib with or without concurrent anticoagulation. DOACs appear safe for VTE treatment for patients with RCC on cabozantinib, but optimized anticoagulation management, including individualized risk-benefit discussion, remains important in clinical practice.
Abbreviations:AXL (Growth arrest-specific protein 6 receptor), CAT (Cancer-associated thrombosis), c-MET (Hepatocyte growth factor receptor), CT (Computerized tomography), DOAC (Direct oral anticoagulant), DVT (Deep venous thrombosis), IMDC (International Metastatic RCC Database Consortium), IO (Immunotherapy), ISTH (International Society on Thrombosis and Hemostasis), LMWH (Low molecular weight heparin), PE (Pulmonary embolism), RCC (Renal cell carcinoma), TKI (Tyrosine kinase inhibitor), VEGFR (Vascular endothelial growth factor receptor), VTE (Venous thromboembolism)
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Published online: November 02, 2022
Accepted: October 24, 2022
Received in revised form: October 23, 2022
Received: September 29, 2022
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