Background
Bevacizumab, an anti-vascular endothelial growth factor monoclonal antibody, is known to inhibit angiogenesis and prevent carcinogenesis. Recent evidence from the IMbrave050 trial indicates that combining bevacizumab with atezolizumab enhances recurrence-free survival (RFS) in high-risk HCC patients undergoing curative treatments. Bevacizumab is notorious for causing endothelial dysfunction that may provoke vasospasm, leading to central hypoperfusion, hypertension, and, albeit rarely, PRES. Similarly, immunotherapy, including atezolizumab, has been implicated in PRES, underscoring a potential risk when these therapies are administered concurrently.
Case Presentation
A 64-year-old woman with a history of hepatitis C and alcoholic cirrhosis was diagnosed with stage II (T2 N0 M0) HCC. Following partial hepatectomy, we proceeded with adjuvant systemic therapy with atezolizumab and bevacizumab (per the IMbrave050 trial). After her 2nd treatment, she developed altered mental status, seizures, and severe hypertension. Labs revealed acute kidney injury and elevated creatinine kinase levels suggesting rhabdomyolysis. Computed tomography head showed no acute findings, but magnetic resonance imaging of the brain identified increased flair attenuated inversion recovery (FLAIR) signal in the brain’s posterior regions, indicating PRES. Symptomatic management with anti-hypertensives and intravenous fluids led to the recovery of mental status to baseline. Further therapy with bevacizumab and atezolizumab was then held off.
Discussion
Therapeutic advances in HCC management through the IMbrave050 trial demonstrate the efficacy of bevacizumab and atezolizumab in reducing RFS, without highlighting the serious side effects like PRES. To our knowledge, this is the first case reported where PRES occurred with the simultaneous use of atezolizumab and bevacizumab. Since both drugs can individually cause PRES, there might be a heightened risk with the co-administration, signaling a critical need for vigilant monitoring and further research into this treatment modality’s long-term safety profile.