Immune Checkpoint Inhibitor in Hepatocellular Carcinoma: Response Rates, Adverse Events, and Predictors of Response.

Hepatocellular carcinoma (HCC) is the most common primary hepatic malignancy. Barcelona Clinic Liver Cancer (BCLC) guidelines recommend antiangiogenic agents with immune checkpoint inhibitors as first-line therapy for advanced HCC. We present our experience of treating HCC patients with Atezolizumab-Bevacizumab, their response rates, adverse events, survival, and response and survival predictors. This retrospective analysis included HCC patients diagnosed at All India Institute of Medical Sciences, New Delhi, India between July 2021 and April 2024 and receiving at least one dose of Atezolizumab-Bevacizumab. The primary outcome was overall response rate (ORR), comprising complete response (CR) and partial response (PR), as per mRECIST criteria. Secondary outcomes were overall survival (OS), progression-free survival (PFS), and predictors of response and survival. Sixty-three patients were analyzed {mean age: 56.0 + 12.7 years; 82.5% males}. Forty-three (68.2%) patients had BCLC stage C HCC. Thirty-five (55.5%) patients belonged to Child-Pugh class A and 28 (44.5%) belonged to Child-Pugh class B. At 1 year, OS was 39% and PFS was 27%. Among 43 patients with data for radiological response, ORR was 48.8% (CR-9.3% and PR-39.5%) and DCR was 62.7% with stable disease (SD) in 13.9% of patients. PD occurred in 37.2% of patients. AFP response predicted radiological response, while Child-Pugh class and BCLC stage predicted survival. Adverse events were reported in 49.2% of patients. Our study shows slightly lower survival than previous studies with Child-Pugh class being the most important determinant of survival. AFP response predicts radiological response and not survival.