Outcomes of Post-Immunotherapy Durable Responders of Advanced Hepatocellular Carcinoma- with Emphasis on Locoregional Therapy for Oligoprogression

Tsung Hao Liu, San Chi Chen, Kun Ming Rau, Li Chun Lu, Po Ting Lin, Yung Yeh Su, Wei Teng, Shiue Wei Lai, Ren Hua Yeh, Tsui Mai Kao, Pei Chang Lee, Chi Jung Wu, Chien Hung Chen, Chih Hung Hsu, Shi Ming Lin, Yi Hsiang Huang, Li Tzong Chen, Ann Lii Cheng, Ying Chun Shen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Introduction: The progression patterns, dispositions, and outcomes of patients with advanced hepatocellular carcinoma (HCC) who achieved durable responses with immunotherapy remain poorly characterized. Methods: Patients with advanced HCC who received immune checkpoint inhibitor (ICI)-based immunotherapy and achieved durable responses were retrospectively included. A durable response was defined as partial response (PR) or stable disease (SD) per RECIST 1.1 for more than 8 months after initiation of immunotherapy. Oligoprogression and polyprogression were defined as progression at ≥3 and <3 lesions, respectively. Results: A total of 91 durable responders (63 PR and 28 SD) were identified. The majority had chronic viral hepatitis (n = 69, 75.8%). Forty-seven (51.6%) and 44 (48.4%) patients received the index immunotherapy as first-line and second- or beyond-line therapy, respectively. Fifty-four (59.3%) patients subsequently developed progression, with a predominant pattern of oligoprogression (66.7%). The median overall survival (OS) was 46.2 months (95% CI: 34.1 58.3). For patients with subsequent progression, employment of locoregional therapy (LRT) for progression was associated with prolonged OS (univariate analysis: hazard ratio [HR] 0.397, p = 0.009; multivariate analysis: HR 0.363, p = 0.050). Patients with oligoprogression who received LRT showed longer median OS than those who did not (48.4 vs. 20.5 months, p > 0.001). In contrast, the median OS of patients with polyprogression who received LRT was not different from those without LRT (27.7 vs. 25.5 months, p = 0.794). Conclusion: Approximately 60% of the post-immunotherapy durable responders of HCC subsequently develop progression. Proactive LRT may further rescue patients who develop subsequent oligoprogression. Prospective studies are mandatory to clarify the proper management of durable responders with subsequent progression.

Original languageEnglish
Pages (from-to)509-521
Number of pages13
JournalLiver Cancer
Volume13
Issue number5
DOIs
StatePublished - 1 Feb 2024

Keywords

  • Durable response
  • Hepatocellular carcinoma
  • Immunotherapy
  • Locoregional therapy
  • Oligoprogression

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