Real-world clinical characteristics and treatment patterns among people with hepatocellular carcinoma in the United States (US) treated with resection or ablation.

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436 Background: Treatment guidelines for early-stage hepatocellular carcinoma (eHCC) include therapies with curative intent comprising three primary strategies: liver transplantation, surgical resection, or ablation (for small lesions). However, many people experience HCC recurrence, with recurrence rates of up to approximately 80% within 5 years after resection. Furthermore, contemporary insights into the eHCC treatment landscape and post-recurrence treatment patterns in the real-world setting are lacking. This study was designed to assess demographic and clinical characteristics and treatment patterns for people with HCC who received resection or ablation as a proxy for defining early-stage disease. Methods: This was a retrospective observational cohort study of adults with HCC treated with resection or ablation in the US, conducted using linked electronic health records and healthcare claims from Optum’s de-identified Market Clarity Data. Index date was the date of the first observed resection or ablation between July 2016 and March 2021. Baseline characteristics were assessed in the 6-month period prior to index, and patients (pts) were followed until end of continuous enrolment in a medical and pharmacy plan, death, or data cut-off (September 2022), whichever occurred first. Demographic and clinical characteristics and treatment patterns, including subsequent treatments, were described. Results: A total of 649 pts met the study criteria and were included in the analyses. The median duration of follow-up was 23.0 months (range: 0.03–74.55 months). The mean age at index was 64.1 years (median 64.0 years), with a majority male gender (72.9%) and White race (65.5%). A total of 385 pts (59.3%) underwent ablation only, 242 pts (37.3%) underwent resection only, and 22 pts (3.4%) underwent both procedures at index. Transarterial embolization alone was received by 57 (8.8%) pts and was the most common embolization procedure received during follow-up, followed by transarterial chemoembolization alone in 46 (7.1%) pts and transarterial radioembolization in 46 (7.1%) pts. A total of 88 (13.6%) pts received systemic therapies for HCC (tyrosine kinase inhibitors, programmed cell death protein-1/programmed cell death-ligand 1/cytotoxic T-lymphocyte-associated antigen 4 inhibitors, or angiogenesis inhibitors) during follow-up. Conclusions: In this real-world cohort, ablation was the most received curative intent therapy for HCC. Among treatments received during follow-up, locoregional therapies were used most often, followed by systemic therapies. Although limited by its retrospective, observational nature, short duration of follow-up, and availability of data in the database, the results of this analysis provide a contemporary landscape of early-stage treatments for HCC in the real-world setting.